There are several types of antivirus software that can help defend against computer viruses. Antivirus software runs in the background to protect the computer, and needs to be kept updated to recognize new viruses. Computer viruses can have many symptoms, like the computer running slowly, crashing, or programs not working properly. It's important to have antivirus software and keep it updated to prevent viruses from infecting the computer.
Whether you’re loyal to Microsoft’s Internet Explorer, or whether you opt for one of the the dozens of other web browsers available to download and use for free out there (such as Google Chrome, Opera, Mozilla’s Firefox or Mac Safari), you are probably using your preferred browser to access both personal and professional websites. These wondrous tools that are part of our daily (digital) lives can now replace other existing software thanks to something called an extension.
Whether you’re loyal to Microsoft’s Internet Explorer, or whether you opt for one of the the dozens of other web browsers available to download and use for free out there (such as Google Chrome, Opera, Mozilla’s Firefox or Mac Safari), you are probably using your preferred browser to access both personal and professional websites. These wondrous tools that are part of our daily (digital) lives can now replace other existing software thanks to something called an extension.
OBJECTIVES
Introduction
What Is Virus?
Why Virus Are Called “Virus”?
How Do Virus Spread?
Virus Operation
How Virus work?
Common Virus Entry Points
Symptoms Of Virus Attack
Types of Computer Virus
Techniques used by Viruses
Anti-Virus Software
Methods used by Antivirus Software
Actions to Prevent Virus Infection
Conclusion
A virus program is usually able to replicate itself and this too is an
added problem once the virus latches on to a system. Progressively
getting out of control, the virus will attempt to cause as much damage
as possible before it can be detected and eliminated. The replication is
usually intentional and designed to act just like a Trojan, thus causing
the unsuspecting user being caught off guard. If a file that contains a
virus is opened, or copied onto another computer, then the other
computer will also become infected and this process is repeated every
time the file is opened and downloaded onto other systems.
A virus can easily be introduced into a computer system along with
any software program and this is bad news for the users of FTP
otherwise referred to as file transfer protocol. The viruses can also
become a problem when there is referencing done and email
attachments are being used. When the virus enters the computer
system, it can attach itself to, or even replace an existing program.
This of course is not good for the user, who will ultimately open the
attachment or file and cause the virus to be activated.
What’s ILOVEYOU virus? What did it do? When did it start and how did it stop? Who created it and in what language was it created? Find all answers here!
OBJECTIVES
Introduction
What Is Virus?
Why Virus Are Called “Virus”?
How Do Virus Spread?
Virus Operation
How Virus work?
Common Virus Entry Points
Symptoms Of Virus Attack
Types of Computer Virus
Techniques used by Viruses
Anti-Virus Software
Methods used by Antivirus Software
Actions to Prevent Virus Infection
Conclusion
A virus program is usually able to replicate itself and this too is an
added problem once the virus latches on to a system. Progressively
getting out of control, the virus will attempt to cause as much damage
as possible before it can be detected and eliminated. The replication is
usually intentional and designed to act just like a Trojan, thus causing
the unsuspecting user being caught off guard. If a file that contains a
virus is opened, or copied onto another computer, then the other
computer will also become infected and this process is repeated every
time the file is opened and downloaded onto other systems.
A virus can easily be introduced into a computer system along with
any software program and this is bad news for the users of FTP
otherwise referred to as file transfer protocol. The viruses can also
become a problem when there is referencing done and email
attachments are being used. When the virus enters the computer
system, it can attach itself to, or even replace an existing program.
This of course is not good for the user, who will ultimately open the
attachment or file and cause the virus to be activated.
What’s ILOVEYOU virus? What did it do? When did it start and how did it stop? Who created it and in what language was it created? Find all answers here!
[Exposicion] Computer and Internet CrimeGerman Teran
Society is turning digital and so its crimes. Internet is not only a great tool for research, it is also a perfect place for criminal... how to apply law in those cases?
Create another jurisdiction?
Computer security threats & prevention,Its a proper introduction about computer security and threats and prevention with reference. Have info about threats and their prevention.
Being aware of online and malware threats is the first step to computer security. In this presentation, we help you understand:
a. Importance of computer security
b. Consequences of ignoring computer security
c. Types of threats that can harm your computer
d. Measures to take to keep your computer safe
e. How can Quick Heal help
Computer Introduction-Lecture04 for applied scince college students, Seiyun University , yemen 2023-2024 Academic year. لطلاب كلية العلوم التطبيقية بجامعة سيئون
مقدمة في علوم الحاسوب المحاضرة الرابعة
In this era of modern technology, computers play a very important role in our
daily lives. Computers play its functions in private homes, offices, workspaces, hospitals,
schools, and everywhere else. It is undeniable that computers are very important
nowadays but of course, no matter how great the technology is, there will still be some
flaws and problems. The existence of computer viruses revolutionized the way the
computer works and what type of security measures are supposed to be taken to prevent
this serious problem.
Malicious Software,Terminology of malicious programme,Malicious programs,Nature of Viruses,Virus Operation-four phases or life cycle of virus,Virus Structure,Types of Viruses,Anti-Virus Software
This Presentation explains about Firewalls, Viruses and Antiviruses. I hope this presentation may help you in understanding about Viruses, Firewall and Antiviruses Software.
From Slave to Scourge: The Existential Choice of Django Unchained. The Philos...Rodney Thomas Jr
#SSAPhilosophy #DjangoUnchained #DjangoFreeman #ExistentialPhilosophy #Freedom #Identity #Justice #Courage #Rebellion #Transformation
Welcome to SSA Philosophy, your ultimate destination for diving deep into the profound philosophies of iconic characters from video games, movies, and TV shows. In this episode, we explore the powerful journey and existential philosophy of Django Freeman from Quentin Tarantino’s masterful film, "Django Unchained," in our video titled, "From Slave to Scourge: The Existential Choice of Django Unchained. The Philosophy of Django Freeman!"
From Slave to Scourge: The Existential Choice of Django Unchained – The Philosophy of Django Freeman!
Join me as we delve into the existential philosophy of Django Freeman, uncovering the profound lessons and timeless wisdom his character offers. Through his story, we find inspiration in the power of choice, the quest for justice, and the courage to defy oppression. Django Freeman’s philosophy is a testament to the human spirit’s unyielding drive for freedom and justice.
Don’t forget to like, comment, and subscribe to SSA Philosophy for more in-depth explorations of the philosophies behind your favorite characters. Hit the notification bell to stay updated on our latest videos. Let’s discover the principles that shape these icons and the profound lessons they offer.
Django Freeman’s story is one of the most compelling narratives of transformation and empowerment in cinema. A former slave turned relentless bounty hunter, Django’s journey is not just a physical liberation but an existential quest for identity, justice, and retribution. This video delves into the core philosophical elements that define Django’s character and the profound choices he makes throughout his journey.
Link to video: https://youtu.be/GszqrXk38qk
In the vast landscape of cinema, stories have been told, retold, and reimagined in countless ways. At the heart of this narrative evolution lies the concept of a "remake". A successful remake allows us to revisit cherished tales through a fresh lens, often reflecting a different era's perspective or harnessing the power of advanced technology. Yet, the question remains, what makes a remake successful? Today, we will delve deeper into this subject, identifying the key ingredients that contribute to the success of a remake.
Maximizing Your Streaming Experience with XCIPTV- Tips for 2024.pdfXtreame HDTV
In today’s digital age, streaming services have become an integral part of our entertainment lives. Among the myriad of options available, XCIPTV stands out as a premier choice for those seeking seamless, high-quality streaming. This comprehensive guide will delve into the features, benefits, and user experience of XCIPTV, illustrating why it is a top contender in the IPTV industry.
Meet Dinah Mattingly – Larry Bird’s Partner in Life and Loveget joys
Get an intimate look at Dinah Mattingly’s life alongside NBA icon Larry Bird. From their humble beginnings to their life today, discover the love and partnership that have defined their relationship.
Scandal! Teasers June 2024 on etv Forum.co.zaIsaac More
Monday, 3 June 2024
Episode 47
A friend is compelled to expose a manipulative scheme to prevent another from making a grave mistake. In a frantic bid to save Jojo, Phakamile agrees to a meeting that unbeknownst to her, will seal her fate.
Tuesday, 4 June 2024
Episode 48
A mother, with her son's best interests at heart, finds him unready to heed her advice. Motshabi finds herself in an unmanageable situation, sinking fast like in quicksand.
Wednesday, 5 June 2024
Episode 49
A woman fabricates a diabolical lie to cover up an indiscretion. Overwhelmed by guilt, she makes a spontaneous confession that could be devastating to another heart.
Thursday, 6 June 2024
Episode 50
Linda unwittingly discloses damning information. Nhlamulo and Vuvu try to guide their friend towards the right decision.
Friday, 7 June 2024
Episode 51
Jojo's life continues to spiral out of control. Dintle weaves a web of lies to conceal that she is not as successful as everyone believes.
Monday, 10 June 2024
Episode 52
A heated confrontation between lovers leads to a devastating admission of guilt. Dintle's desperation takes a new turn, leaving her with dwindling options.
Tuesday, 11 June 2024
Episode 53
Unable to resort to violence, Taps issues a verbal threat, leaving Mdala unsettled. A sister must explain her life choices to regain her brother's trust.
Wednesday, 12 June 2024
Episode 54
Winnie makes a very troubling discovery. Taps follows through on his threat, leaving a woman reeling. Layla, oblivious to the truth, offers an incentive.
Thursday, 13 June 2024
Episode 55
A nosy relative arrives just in time to thwart a man's fatal decision. Dintle manipulates Khanyi to tug at Mo's heartstrings and get what she wants.
Friday, 14 June 2024
Episode 56
Tlhogi is shocked by Mdala's reaction following the revelation of their indiscretion. Jojo is in disbelief when the punishment for his crime is revealed.
Monday, 17 June 2024
Episode 57
A woman reprimands another to stay in her lane, leading to a damning revelation. A man decides to leave his broken life behind.
Tuesday, 18 June 2024
Episode 58
Nhlamulo learns that due to his actions, his worst fears have come true. Caiphus' extravagant promises to suppliers get him into trouble with Ndu.
Wednesday, 19 June 2024
Episode 59
A woman manages to kill two birds with one stone. Business doom looms over Chillax. A sobering incident makes a woman realize how far she's fallen.
Thursday, 20 June 2024
Episode 60
Taps' offer to help Nhlamulo comes with hidden motives. Caiphus' new ideas for Chillax have MaHilda excited. A blast from the past recognizes Dintle, not for her newfound fame.
Friday, 21 June 2024
Episode 61
Taps is hungry for revenge and finds a rope to hang Mdala with. Chillax's new job opportunity elicits mixed reactions from the public. Roommates' initial meeting starts off on the wrong foot.
Monday, 24 June 2024
Episode 62
Taps seizes new information and recruits someone on the inside. Mary's new job
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Create a Seamless Viewing Experience with Your Own Custom OTT Player.pdfGenny Knight
As the popularity of online streaming continues to rise, the significance of providing outstanding viewing experiences cannot be emphasized enough. Tailored OTT players present a robust solution for service providers aiming to enhance their offerings and engage audiences in a competitive market. Through embracing customization, companies can craft immersive, individualized experiences that effectively hold viewers' attention, entertain them, and encourage repeat usage.
Tom Selleck Net Worth: A Comprehensive Analysisgreendigital
Over several decades, Tom Selleck, a name synonymous with charisma. From his iconic role as Thomas Magnum in the television series "Magnum, P.I." to his enduring presence in "Blue Bloods," Selleck has captivated audiences with his versatility and charm. As a result, "Tom Selleck net worth" has become a topic of great interest among fans. and financial enthusiasts alike. This article delves deep into Tom Selleck's wealth, exploring his career, assets, endorsements. and business ventures that contribute to his impressive economic standing.
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Early Life and Career Beginnings
The Foundation of Tom Selleck's Wealth
Born on January 29, 1945, in Detroit, Michigan, Tom Selleck grew up in Sherman Oaks, California. His journey towards building a large net worth began with humble origins. , Selleck pursued a business administration degree at the University of Southern California (USC) on a basketball scholarship. But, his interest shifted towards acting. leading him to study at the Hills Playhouse under Milton Katselas.
Minor roles in television and films marked Selleck's early career. He appeared in commercials and took on small parts in T.V. series such as "The Dating Game" and "Lancer." These initial steps, although modest. laid the groundwork for his future success and the growth of Tom Selleck net worth. Breakthrough with "Magnum, P.I."
The Role that Defined Tom Selleck's Career
Tom Selleck's breakthrough came with the role of Thomas Magnum in the CBS television series "Magnum, P.I." (1980-1988). This role made him a household name and boosted his net worth. The series' popularity resulted in Selleck earning large salaries. leading to financial stability and increased recognition in Hollywood.
"Magnum P.I." garnered high ratings and critical acclaim during its run. Selleck's portrayal of the charming and resourceful private investigator resonated with audiences. making him one of the most beloved television actors of the 1980s. The success of "Magnum P.I." played a pivotal role in shaping Tom Selleck net worth, establishing him as a major star.
Film Career and Diversification
Expanding Tom Selleck's Financial Portfolio
While "Magnum, P.I." was a cornerstone of Selleck's career, he did not limit himself to television. He ventured into films, further enhancing Tom Selleck net worth. His filmography includes notable movies such as "Three Men and a Baby" (1987). which became the highest-grossing film of the year, and its sequel, "Three Men and a Little Lady" (1990). These box office successes contributed to his wealth.
Selleck's versatility allowed him to transition between genres. from comedies like "Mr. Baseball" (1992) to westerns such as "Quigley Down Under" (1990). This diversification showcased his acting range. and provided many income streams, reinforcing Tom Selleck net worth.
Television Resurgence with "Blue Bloods"
Sustaining Wealth through Consistent Success
In 2010, Tom Selleck began starring as Frank Reagan i
Young Tom Selleck: A Journey Through His Early Years and Rise to Stardomgreendigital
Introduction
When one thinks of Hollywood legends, Tom Selleck is a name that comes to mind. Known for his charming smile, rugged good looks. and the iconic mustache that has become synonymous with his persona. Tom Selleck has had a prolific career spanning decades. But, the journey of young Tom Selleck, from his early years to becoming a household name. is a story filled with determination, talent, and a touch of luck. This article delves into young Tom Selleck's life, background, early struggles. and pivotal moments that led to his rise in Hollywood.
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Early Life and Background
Family Roots and Childhood
Thomas William Selleck was born in Detroit, Michigan, on January 29, 1945. He was the second of four children in a close-knit family. His father, Robert Dean Selleck, was a real estate investor and executive. while his mother, Martha Selleck, was a homemaker. The Selleck family relocated to Sherman Oaks, California. when Tom was a child, setting the stage for his future in the entertainment industry.
Education and Early Interests
Growing up, young Tom Selleck was an active and athletic child. He attended Grant High School in Van Nuys, California. where he excelled in sports, particularly basketball. His tall and athletic build made him a standout player, and he earned a basketball scholarship to the University of Southern California (U.S.C.). While at U.S.C., Selleck studied business administration. but his interests shifted toward acting.
Discovery of Acting Passion
Tom Selleck's journey into acting was serendipitous. During his time at U.S.C., a drama coach encouraged him to try acting. This nudge led him to join the Hills Playhouse, where he began honing his craft. Transitioning from an aspiring athlete to an actor took time. but young Tom Selleck became drawn to the performance world.
Early Career Struggles
Breaking Into the Industry
The path to stardom was a challenging one for young Tom Selleck. Like many aspiring actors, he faced many rejections and struggled to find steady work. A series of minor roles and guest appearances on television shows marked his early career. In 1965, he debuted on the syndicated show "The Dating Game." which gave him some exposure but did not lead to immediate success.
The Commercial Breakthrough
During the late 1960s and early 1970s, Selleck began appearing in television commercials. His rugged good looks and charismatic presence made him a popular brand choice. He starred in advertisements for Pepsi-Cola, Revlon, and Close-Up toothpaste. These commercials provided financial stability and helped him gain visibility in the industry.
Struggling Actor in Hollywood
Despite his success in commercials. breaking into large acting roles remained a challenge for young Tom Selleck. He auditioned and took on small parts in T.V. shows and movies. Some of his early television appearances included roles in popular series like Lancer, The F.B.I., and Bracken's World. But, it would take a
Experience the thrill of Progressive Puzzle Adventures, like Scavenger Hunt Games and Escape Room Activities combined Solve Treasure Hunt Puzzles online.
Meet Crazyjamjam - A TikTok Sensation | Blog EternalBlog Eternal
Crazyjamjam, the TikTok star everyone's talking about! Uncover her secrets to success, viral trends, and more in this exclusive feature on Blog Eternal.
Source: https://blogeternal.com/celebrity/crazyjamjam-leaks/
As a film director, I have always been awestruck by the magic of animation. Animation, a medium once considered solely for the amusement of children, has undergone a significant transformation over the years. Its evolution from a rudimentary form of entertainment to a sophisticated form of storytelling has stirred my creativity and expanded my vision, offering limitless possibilities in the realm of cinematic storytelling.
From the Editor's Desk: 115th Father's day Celebration - When we see Father's day in Hindu context, Nanda Baba is the most vivid figure which comes to the mind. Nanda Baba who was the foster father of Lord Krishna is known to provide love, care and affection to Lord Krishna and Balarama along with his wife Yashoda; Letter’s to the Editor: Mother's Day - Mother is a precious life for their children. Mother is life breath for her children. Mother's lap is the world happiness whose debt can never be paid.
Skeem Saam in June 2024 available on ForumIsaac More
Monday, June 3, 2024 - Episode 241: Sergeant Rathebe nabs a top scammer in Turfloop. Meikie is furious at her uncle's reaction to the truth about Ntswaki.
Tuesday, June 4, 2024 - Episode 242: Babeile uncovers the truth behind Rathebe’s latest actions. Leeto's announcement shocks his employees, and Ntswaki’s ordeal haunts her family.
Wednesday, June 5, 2024 - Episode 243: Rathebe blocks Babeile from investigating further. Melita warns Eunice to stay clear of Mr. Kgomo.
Thursday, June 6, 2024 - Episode 244: Tbose surrenders to the police while an intruder meddles in his affairs. Rathebe's secret mission faces a setback.
Friday, June 7, 2024 - Episode 245: Rathebe’s antics reach Kganyago. Tbose dodges a bullet, but a nightmare looms. Mr. Kgomo accuses Melita of witchcraft.
Monday, June 10, 2024 - Episode 246: Ntswaki struggles on her first day back at school. Babeile is stunned by Rathebe’s romance with Bullet Mabuza.
Tuesday, June 11, 2024 - Episode 247: An unexpected turn halts Rathebe’s investigation. The press discovers Mr. Kgomo’s affair with a young employee.
Wednesday, June 12, 2024 - Episode 248: Rathebe chases a criminal, resorting to gunfire. Turf High is rife with tension and transfer threats.
Thursday, June 13, 2024 - Episode 249: Rathebe traps Kganyago. John warns Toby to stop harassing Ntswaki.
Friday, June 14, 2024 - Episode 250: Babeile is cleared to investigate Rathebe. Melita gains Mr. Kgomo’s trust, and Jacobeth devises a financial solution.
Monday, June 17, 2024 - Episode 251: Rathebe feels the pressure as Babeile closes in. Mr. Kgomo and Eunice clash. Jacobeth risks her safety in pursuit of Kganyago.
Tuesday, June 18, 2024 - Episode 252: Bullet Mabuza retaliates against Jacobeth. Pitsi inadvertently reveals his parents’ plans. Nkosi is shocked by Khwezi’s decision on LJ’s future.
Wednesday, June 19, 2024 - Episode 253: Jacobeth is ensnared in deceit. Evelyn is stressed over Toby’s case, and Letetswe reveals shocking academic results.
Thursday, June 20, 2024 - Episode 254: Elizabeth learns Jacobeth is in Mpumalanga. Kganyago's past is exposed, and Lehasa discovers his son is in KZN.
Friday, June 21, 2024 - Episode 255: Elizabeth confirms Jacobeth’s dubious activities in Mpumalanga. Rathebe lies about her relationship with Bullet, and Jacobeth faces theft accusations.
Monday, June 24, 2024 - Episode 256: Rathebe spies on Kganyago. Lehasa plans to retrieve his son from KZN, fearing what awaits.
Tuesday, June 25, 2024 - Episode 257: MaNtuli fears for Kwaito’s safety in Mpumalanga. Mr. Kgomo and Melita reconcile.
Wednesday, June 26, 2024 - Episode 258: Kganyago makes a bold escape. Elizabeth receives a shocking message from Kwaito. Mrs. Khoza defends her husband against scam accusations.
Thursday, June 27, 2024 - Episode 259: Babeile's skillful arrest changes the game. Tbose and Kwaito face a hostage crisis.
Friday, June 28, 2024 - Episode 260: Two women face the reality of being scammed. Turf is rocked by breaking
Panchayat Season 3 - Official Trailer.pdfSuleman Rana
The dearest series "Panchayat" is set to make a victorious return with its third season, and the fervor is discernible. The authority trailer, delivered on May 28, guarantees one more enamoring venture through the country heartland of India.
Jitendra Kumar keeps on sparkling as Abhishek Tripathi, the city-reared engineer who ends up functioning as the secretary of the Panchayat office in the curious town of Phulera. His nuanced depiction of a young fellow exploring the difficulties of country life while endeavoring to adjust to his new environmental factors has earned far and wide recognition.
Neena Gupta and Raghubir Yadav return as Manju Devi and Brij Bhushan Dubey, separately. Their dynamic science and immaculate acting rejuvenate the hardships of town administration. Gupta's depiction of the town Pradhan with an ever-evolving outlook, matched with Yadav's carefully prepared exhibition, adds profundity and credibility to the story.
New Difficulties and Experiences
The trailer indicates new difficulties anticipating the characters, as Abhishek keeps on wrestling with his part in the town and his yearnings for a superior future. The series has reliably offset humor with social editorial, and Season 3 looks ready to dig much more profound into the intricacies of rustic organization and self-awareness.
Watchers can hope to see a greater amount of the enchanting and particular residents who have become fan top picks. Their connections and the one of a kind cut of-life situations give a reviving and interesting portrayal of provincial India, featuring the two its appeal and its difficulties.
A Mix of Humor and Heart
One of the signs of "Panchayat" is its capacity to mix humor with sincere narrating. The trailer features minutes that guarantee to convey giggles, as well as scenes that pull at the heartstrings. This equilibrium has been a critical calculate the show's prosperity, resounding with crowds across different socioeconomics.
Creation Greatness
The creation quality remaining parts first rate, with the beautiful setting of Phulera town filling in as a scenery that upgrades the narrating. The meticulousness in portraying provincial life, joined with sharp composition and solid exhibitions, guarantees that "Panchayat" keeps on hanging out in the packed web series scene.
Expectation and Delivery
As the delivery date draws near, expectation for "Panchayat" Season 3 is at a record-breaking high. The authority trailer has previously created critical buzz, with fans enthusiastically anticipating the continuation of Abhishek Tripathi's excursion and the new undertakings that lie ahead in Phulera.
All in all, the authority trailer for "Panchayat" Season 3 recommends that watchers are in for another drawing in and engaging ride. Yet again with its charming characters, convincing story, and ideal mix of humor and show, the new season is set to enamor crowds. Write in your schedules and prepare to get back to the endearing universe of "Panchayat."
240529_Teleprotection Global Market Report 2024.pdfMadhura TBRC
The teleprotection market size has grown
exponentially in recent years. It will grow from
$21.92 billion in 2023 to $28.11 billion in 2024 at a
compound annual growth rate (CAGR) of 28.2%. The
teleprotection market size is expected to see
exponential growth in the next few years. It will grow
to $70.77 billion in 2028 at a compound annual
growth rate (CAGR) of 26.0%.
240529_Teleprotection Global Market Report 2024.pdf
Types of viruses
1. Types Of Viruses
Not all computer viruses behave, replicate, or infect the same way. There are several different
categories of viruses and malware. Below I list and discuss some of the most common types of computer
viruses.
Trojan Horse:
A trojan horse program has the appearance of having a useful and desired function. While it may
advertise its activity after launching, this information is not apparent to the user beforehand. Secretly
the program performs other, undesired functions. A Trojan Horse neither replicates nor copies itself, but
causes damage or compromises the security of the computer. A Trojan Horse must be sent by someone
or carried by another program and may arrive in the form of a joke program or software of some sort.
The malicious functionality of a Trojan Horse may be anything undesirable for a computer user, including
data destruction or compromising a system by providing a means for another computer to gain access,
thus bypassing normal access controls.
Worms:
A worm is a program that makes and facilitates the distribution of copies of itself; for example, from one
disk drive to another, or by copying itself using email or another transport mechanism. The worm may
do damage and compromise the security of the computer. It may arrive via exploitation of a system
vulnerability or by clicking on an infected e-mail.
Bootsector Virus:
A virus which attaches itself to the first part of the hard disk that is read by the computer upon bootup.
These are normally spread by floppy disks.
Macro Virus:
Macro viruses are viruses that use another application's macro programming language to distribute
themselves. They infect documents such as MS Word or MS Excel and are typically spread
to other similar documents.
Memory Resident Viruses:
Memory Resident Viruses reside in a computers volitale memory (RAM). They are
initiated from a virus which runs on the computer and they stay in memory after it's
initiating program closes. ppppppppppp
Rootkit Virus:
A rootkit virus is an undetectable virus which attempts to allow someone to gain control
of a computer system. The term rootkit comes from the linux administrator root user.
These viruses are usually installed by trojans and are normally disguised as operating
system files.
Polymorphic Viruses:
A polymorphic virus not only replicates itself by creating multiple files of itself, but it also
changes it's digital signature every time it replicates. This makes it difficult for less
sophisticated antivirus software to detect.
Logic Bombs/Time Bombs:
These are viruses which are programmed to initiate at a specific date or when a specific
event occurs. Some examples are a virus which deletes your photos on Halloween, or a
virus which deletes a database table if a certain employee gets fired.
2. Computer virus
From Wikipedia, the free encyclopedia
See also: Malware
A computer virus is a computer program that can replicate itself[1] and spread from one computer to
another. The term "virus" is also commonly, but erroneously, used to refer to other types ofmalware,
including but not limited to adware and spyware programs that do not have a reproductive ability.
Malware includes computer viruses, computer worms, Trojan horses, most rootkits, spyware, dishonest
adware and other malicious or unwanted software, including true viruses. Viruses are sometimes confused
with worms and Trojan horses, which are technically different. A worm can exploit security vulnerabilities to
spread itself automatically to other computers through networks, while a Trojan horse is a program that
appears harmless but hides malicious functions. Worms and Trojan horses, like viruses, may harm a
computer system's data or performance. Some viruses and other malware have symptoms noticeable to
the computer user, but many are surreptitious or simply do nothing to call attention to themselves. Some
viruses do nothing beyond reproducing themselves.
3. Script Viruses - Types and Habitats
Script viruses (sometimes called macro viruses) generally travel embedded in email and office
automation documents, although they can be found in web pages as well.
Old fashioned program viruses are usually implemented in executable system code, whereas script
viruses are usually written in a powerful high-level language that is compiled and run on the fly.
They often have sophisticated functionality and direct interfaces to high level applications such as
word processing, spreadsheet, email, and web programs, and can wreak considerable havoc. Since
they first surfaced in office automation programs, they are sometimes also called "macro" viruses.
Script viruses can also propagate through IRC protocols.
On Microsoft computers, turning on your script checking virus protection is essential. However,
keep in mind that there may be an associated performance hit for some applications. Many
applications on Windows are written in Visual Basic, and real-time script virus checking can double
the time it takes for their usual functions to run. If you find that ordinary functions take an
inordinate length of time to complete, you can try temporarily turning this feature off in your anti-
virus checker -- but don't forget to turn it back on afterwards!
Active threats. The following types of script viruses are currently the most active and dangerous,
on the Windows platform:
Visual Basic is a flexible and powerful programming environment for Microsoft Windows,
Office, and Internetapplications. Script viruses written in Visual Basic can run throughout
the Microsoft architecture, giving them considerable reach and power, and making them
the primary virus threat today.
The first widespread Visual Basic script virus was Melissa, which brought down several of
the large international corporations for several days in March 1999. Melissa traveled in a
Microsoft Word document and ran when the document was opened, then opened the
associated Microsoft Outlook email program, read the user's email address book, and then
sent email copies of itself to the first fifty names it found. It spread very quickly.
The Melissa virus architecture was quickly followed by many similar variants programmed
by hackers around the world, including the ground breaking KAK, the first Visual Basic
script virus that triggered as soon as an email was opened. KAK was then followed
by BubbleBoy, which triggered if an email was even viewed in the preview pane. A steady
stream of Visual Basic script viruses continue to circulate to this day. There are even
automated, point and click programs like VBS Love Generator to help hackers produce
additional variants. Script viruses which use email to send themselves to others are also a
form of worm.
The term "macro virus" is used less often, and generally refers to a virus in an office
4. automation application macro, most commonly a Visual Basic macro in a Microsoft Word or
Excel document. Macro viruses can cross system boundaries from Windows to Macintosh
computers with MS Office documents. Current versions of Microsoft Office contain strong
anti-macro protections to guard against known attacks.
ActiveX is one of Microsoft's distributed application technologies that enable web pages to
download programs on the fly with the full power of any executable running on your
machine. This makes ActiveX modules especially efficient and powerful, but also a security
risk since they can create, change, and delete files, add system programming code, or
take any other action your user account is allowed on your computer.
To help mitigate the risk, Microsoft provides a network architecture of encrypted security
certificates for ActiveX modules. This network gives you the option of refusing the
download of unsigned ActiveX modules from unknown authors, and at least disclosing the
signed identity of those modules that you do accept in case they later cause problems.
However, this approach is not universally accepted by the general user and professional
security communities, and is sometimes called "trust me now, try to catch me later". Users
running Internet Explorer on Windows machines should make sure that their browser
security settings are set to "disable" for unsigned ActiveX applets, and to "prompt" for
signed applets.
Hypothetical threats. The following script viruses are largely theoretical, but illustrate that they
can turn up wherever there is scripting code:
Java is a standard cross platform development environment, and is often used to download
scripts to add functionality like a clock or chat room interface to a web page. Java was
written with a strong security model which protects your computer's data and resources,
and it has so far proved remarkably resistant to script virus infection. You can turn Java off
in your browser if you want to be extra careful, but it will disable some useful functionality
on some web pages.
JavaScript is the standard web programming language. JavaScript also has a well-defined
security model that protects data and resources, and the few JavaScript viruses that have
been discovered have been mainly theoretical in nature. You can turn JavaScript off in
your browser settings if you want to be extra careful, but it will disable functionality on
many web pages.
MIME. The first script virus that triggered as soon as an email was opened was a MIME
virus that applied to older versions of Netscape Mail, Microsoft Outlook, and Eudora Mail.
In a variation on an old hacker technique, the attached MIME file was given a very long
name that triggered a bug which allowed the end of the name to be run as a series of
instructions, which could then be written to run the virus. However, a fix for the bug was
quickly developed for each vulnerable email program, and MIME viruses have so far
remained hypothetical.
Others. Several other scripting environments have also had viruses, including Corel Draw,
Hypertext Preprocessor, Windows Help, Windows installation files, and Windows registry
files. Anywhere there is a script interpreter there is an opportunity for a script virus to run.
Resources. The following sites provide more information on script and macro viruses:
Disabling Windows Scripting Host
Microsoft Macro Viruses
Yahoo -- Macro Viruses.
5. Computer Virus Symptoms and Solutions
If your computer is infected with a malicious computer virus, it may begin to show a series of Computer
Virus symptoms that indicate that a virus is present. Computer viruses can be very harmful and damaging to
your computer system, root files, and various program files. A computer virus can also increase the risk of
hacker threats and attacks, and open the door to even more unauthorized downloads and software
installations. Once you diagnose the computer virus symptoms, then computer viruses can be counterattacked
with the appropriate antivirus software and suite packages, but this needs to be installed well before the virus
has infected the system.
Many computer viruses are designed to self-replicate and self-install over a very short period of time. They
come encoded with specific instructions to destroy and advance through its host computer, and can affect a
multitude of programs and applications very quickly. Recognizing the symptoms of a computer virus can help
to successfully remove it from the infected computer as quickly as possible; the sooner this is completed, the
easier it will be to recover any documents or programs that may be damaged, and prevent the virus from
further spreading.
Backing up computer files on a regular basis is just one preventative measure in protecting the data on your
computer. Installing a powerful antivirus program is the next step, as this can indicate the presence of a
malicious computer virus before it has a chance to spread. Still, recognizing the symptoms of a virus is fairly
simple when you know what to look for.
A computer virus may have installed itself on your computer through a Trojan, a security breach, unauthorized
access on your computer, or an e-mail attachment that also included malicious code. After a virus begins to
spread, many program files can become unstable and display warnings. The operating system may not launch
properly, and the computer user may need to reboot and restart the computer frequently to ensure all
programs are starting and working fine. Critical files may get deleted automatically, and this can happen
periodically or all at once. Error messages will become prevalent; it may become difficult to save documents,
and the computer may be running slower than usual. If a system or network is infected severely, it may even
black out or not even launch the startup process.
Some other symptoms of a computer virus involve the computer hardware itself. CD-ROM drive trays may
open and close by themselves, without the user directing the function. Programs may launch at their own, and
unusual sounds may play randomly. Some e-mail messages may not be sent or received properly, and e-mail
attachments may disappear. If the computer is freezing consistently, or files and folders seem to disappear or
will not open, these are clear signs that an area of the hard drive is “malfunctioning” (actually is not, but is
affected by a virus). The computer may also display a series of pop-up ads and strange messages upon
startup; this is a clear indicator that adware programs have been installed, and these are very difficult to
remove manually.
In addition, disk space can become overloaded and cause frequent computer crashes. Viruses can duplicate
large-sized programs to the point that the computer cannot handle the files. This will reduce the chances of
even installing an antivirus program successfully, so early detection is key to detecting and removing the
dangerous virus.
Lately, computer viruses have been created so they can change some of the core system files (Microsoft
Windows) so that web sites of most of antivirus software companies become inaccessible. Your Internet
6. browser will either switch to some other web site or simply show “not found”. What is happening is that you
are being prevented from finding a way of getting antivirus software cleaning your system.
Finally, the best way of recognizing computer virus symptoms and preventing computer viruses and other
Internet based threats to invade your computer is to have the latest, up to date computer security software,
which can be a basic version of antivirus program or some of the all-in-one software suites.
What is a computer virus?
Computer viruses are small software programs that are designed to spread from one computer to another and to
interfere with computer operation.
What do computer viruses do?
Through the course of using the Internet and your computer, you may have come in to contact with computer
viruses. Many computer viruses are stopped before they can start, but there is still an ever growing concern as to
what do computer viruses do and the list of common computer virus symptoms. A computer virus might corrupt
or delete data on your computer, use your email program to spread itself to other computers, or even erase
everything on your hard disk.
Computer viruses are often spread by attachments in email messages or instant messaging messages. That is why
it is essential that you never open email attachments unless you know who it's from and you are expecting it.
Viruses can be disguised as attachments of funny images, greeting cards, or audio and video files.
Computer viruses also spread through downloads on the Internet. They can be hidden in illicit software or other
files or programs you might download.
To help avoid computer viruses, it's essential that you keep your computer current with the latest
updates and antivirus tools, stay informed about recent threats, run your computer as a standard user (not as
administrator), and that you follow a few basic ruleswhen you surf the Internet, download files, and open
attachments.
Once a virus is on your computer, its type or the method it used to get there is not as important as removing it
and preventing further infection.
Definition: "antivirus" is protective software designed to defend your computer against malicious
software. Malicious software, or "malware" includes: viruses, Trojans, keyloggers, hijackers,
dialers, and other code that vandalizes or steals your computer contents. In order to be an
effective defense, your antivirus software needs to run in the background at all times, and should
be kept updated so it recognizes new versions of malicious software.
Types Of Antivirus
7. A computer virus is a computer program that can copy itself and infect a computer without the
knowledge or permission of the owner. A virus can only be spread from one computer to another
through some form of executable codes. Viruses can be sent over a network, the Internet, floppy
disk, CD, or USB drive. Viruses can increase changes of spreading to other computers by infecting
files on a network system that is accessed by other computers.
The term computer virus is used to include all types or malware such as computer viruses, trojan
horses, most rootkits, spyware, dshonest adware, crimeware, and other malicious unwanted
software. Since most computers are now connected to the Internet and local networks it is increasing
the chance for spreading malicious virus codes. Since February 2009 there are over 287,524 and
growing computer viruses.
Symptoms
Computer viruses are among the most known problem that is affecting online users. The dangers of
viruses have gotten a lot of attention over the year, and without simple attention they will continue to
spread. Computer viruses cause a number of symptoms such as:
Computer programs taking longer to load than normal.
The computer is slower than normal.
Computer stops responding or freezes frequently.
Computer crashes and restarts every few minutes.
The computer does not run as usual.
Applications on the computer do not work correctly.
Disks or disk drives are inaccessible.
Printing items is difficult.
Error messages appear rapidly.
Distorted menus and dialog boxes.
Double extensions on attachments that you have already opened (jpg,vbs,gif, exe, and etc).
Antivirus programs get disabled for no reason, and cannot be restarted.
Antivirus programs will not start, and new programs cannot be installed.
Strange sounds plays from the speakers unexpectedly.
Programs disappear from the computer.
8. These symptoms are common signs of computer virus infection, and they are also warning signs that
you may be getting a computer virus. When you suspect that you are getting a computer virus there
are many ways to take care of it. Before you can get a virus it is best to prevent them from getting into
your computer by having a anti virus software.
AntiVirus Software
Antivirus software is used to prevent, detect, and remove malware and other computer viruses. Anti
virus software systems detections involve searching for known malicious patterns in executable code.
it is possible for a user to be infected with new viruses that have no sign or symptoms or existence.
To counter this problem of zero day threats, anti virus systems can be used to detect these viruses
when you don't even know that they are there.
There are many different types of anti virus software that have been developed over the years.
Original products were just scanners that would search through the hard disk looking for viruses. As
viruses have become more common and difficult, the more anti virus software is being made to keep
up with current virus issues. There are many different types of general virus scanners that are used
on PCs today:
Conventional Disk Scanner
This is the stand virus check program. It can be ran upon the users request, and it scans the contents
of the disks, directories or files that the users wants, for any boot sectors or files that contain viruses
that it recognizes. These are usually ran manually by the user as a preventive maintenance activity or
when they thing a virus is suspected. The user can schedule automatic scanning through the use of a
program scheduler.
Memory Resident Scanners
An anti virus software that now come with a special program that sits in the background while your
using your computer and it automatically scans for viruses based on different triggers. These
programs can automatically scan as they run or scan floppy disks when you command a shutdown of
your system. This scanner offers increased protection and more chances of catching a virus before it
does damage to your computer.
Behavior Based Detection
Some products offer an option where they will sit in memory and look for virus like behavior and
suspicious activity. Behavior based detection is looking for the types of actions taken on files or boot
sectors that might be performed by viruses trying to spread. This type of antivirus software will look for
a trap, and will generically catch viruses red handed.
Start up Scanners
9. This type of antivirus scanner is designed to be run every time the PC is booted up. It preforms a
quick scan of the disks boot sectors and critical system files. the idea is to catch these viruses before
the PC boots up reducing the chance of it to spread.
Inoculation
Instead of scanning for viruses this type of antivirus software looks for changes that the viruses make
to files and boot sectors. With a clean system the software will get a snap shot of information in each
boot sector about its content and size. Periodically it will re examine these files to see if anything has
changed.
Top Anti Virus Software
The Shield Deluxe 2009 Antivirus & Antispyware
Webroot Antivirus with Antispyware 6.0
BitDefender Antivirus 2009
CA Anti-Virus Plus 2009
McAfee VirusScan Plus 2009
Norton Antivirus 2009
ESET NOD 32 3.0