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Computer viruses are malicious software that can damage computers. They spread by replicating themselves and infecting other files without the user's permission. Viruses become installed on computers through opening unknown files, messages, emails, disks, or when installing software without checking for viruses. Common types of viruses include Trojan horses, worms, and logic bombs. Users can avoid viruses by using antivirus software and practicing safe computing habits like not opening suspicious files from unknown sources.
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Computer virus
A computer virus is a program that can copy itself and infect computers without users' knowledge. Viruses may or may not harm computers. They have two main characteristics: the ability to replicate itself and attach to other computers. Signs of a virus include slowed performance, crashing, and program errors. Some early viruses were Brain, Centipede, Walker, and Elk Cloner. Viruses can infect files and disks and spread via email or USB drives. There are program, boot, and macro viruses that infect different parts of a computer.
Computer virus
Computer viruses are programs that infect computers without the user's permission or knowledge. They can replicate themselves and spread from computer to computer. Common symptoms of a virus infection include unexpected messages, deleted files, added files, or issues with hardware like keyboards. A worm is similar to a virus but does not attach itself to other programs; it uses networks to spread. There are different types of viruses classified by how they infect systems, like memory-resident viruses that remain active after infection or boot sector viruses that target the boot process. Macro viruses embed themselves in documents to infect users opening files, while email viruses are aware of email functions and can harvest addresses to send themselves to new users.
Computer Virus
Computer viruses, worms, and other threats can damage systems. Viruses are programs that attach themselves to other programs and replicate. There are several types of viruses including boot sector, TSR, macro, and polymorphic viruses. Worms replicate independently across networks. Trojans also carry payloads but don't replicate. Antivirus software uses signatures to detect threats but also monitors for unusual activity. Maintaining strong passwords, firewalls, and updating systems help prevent infection.
computer virus Report
This document provides an introduction and overview of computer viruses. It defines computer viruses and explains how they work, discussing how viruses actively infect systems and spread. It categorizes common types of computer viruses such as macro viruses, memory resident viruses, overwrite viruses, and more. Specific virus names are listed as examples for each category. The document also discusses how to protect systems from computer viruses and describes some problems caused by viruses.
Computer virus
This document provides an overview of computer viruses including what they are, how they spread and different types. A virus is a program that runs without permission and can replicate itself. They have been an issue since 1987 and spread through email attachments, external devices and malicious web content. Viruses can damage software and data, slow systems down, steal information and take control of computers. Common types include adware, spyware, worms, Trojans, bots and email viruses. It's important to have antivirus software and scan all downloads and disks to protect against viruses.
Computer virus
Computer viruses are malicious software programs that can damage computers and spread without permission. Viruses are often transmitted by email attachments, downloaded files, removable drives, and through networks. They work by attaching themselves to other programs or files. To prevent virus infections, it is important to have up-to-date antivirus software installed and configured to run regularly, only open trusted email attachments, be careful when downloading files, and back up files frequently.
virus and antivirus
a small presentation on virus and anti virus. and its prevention and cure. and also the effects of virus in computers.
Computer virus
The document discusses computer viruses, how they spread and affect systems. It describes how the first virus, called "Creeper, was created in 1970s and outlines common ways viruses enter systems like through email attachments. Different virus types are outlined like memory resident viruses, boot sector viruses and macro viruses that hide in various parts of the system. Symptoms of virus infection and basic prevention tips are provided.
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Computer virus
A computer virus is a program that can copy itself and infect computers without users' knowledge. Viruses may or may not harm computers. They have two main characteristics: the ability to replicate itself and attach to other computers. Signs of a virus include slowed performance, crashing, and program errors. Some early viruses were Brain, Centipede, Walker, and Elk Cloner. Viruses can infect files and disks and spread via email or USB drives. There are program, boot, and macro viruses that infect different parts of a computer.
Computer virus
Computer viruses are programs that infect computers without the user's permission or knowledge. They can replicate themselves and spread from computer to computer. Common symptoms of a virus infection include unexpected messages, deleted files, added files, or issues with hardware like keyboards. A worm is similar to a virus but does not attach itself to other programs; it uses networks to spread. There are different types of viruses classified by how they infect systems, like memory-resident viruses that remain active after infection or boot sector viruses that target the boot process. Macro viruses embed themselves in documents to infect users opening files, while email viruses are aware of email functions and can harvest addresses to send themselves to new users.
Computer Virus
Computer viruses, worms, and other threats can damage systems. Viruses are programs that attach themselves to other programs and replicate. There are several types of viruses including boot sector, TSR, macro, and polymorphic viruses. Worms replicate independently across networks. Trojans also carry payloads but don't replicate. Antivirus software uses signatures to detect threats but also monitors for unusual activity. Maintaining strong passwords, firewalls, and updating systems help prevent infection.
computer virus Report
This document provides an introduction and overview of computer viruses. It defines computer viruses and explains how they work, discussing how viruses actively infect systems and spread. It categorizes common types of computer viruses such as macro viruses, memory resident viruses, overwrite viruses, and more. Specific virus names are listed as examples for each category. The document also discusses how to protect systems from computer viruses and describes some problems caused by viruses.
Computer virus
This document provides an overview of computer viruses including what they are, how they spread and different types. A virus is a program that runs without permission and can replicate itself. They have been an issue since 1987 and spread through email attachments, external devices and malicious web content. Viruses can damage software and data, slow systems down, steal information and take control of computers. Common types include adware, spyware, worms, Trojans, bots and email viruses. It's important to have antivirus software and scan all downloads and disks to protect against viruses.
Computer virus
Computer viruses are malicious software programs that can damage computers and spread without permission. Viruses are often transmitted by email attachments, downloaded files, removable drives, and through networks. They work by attaching themselves to other programs or files. To prevent virus infections, it is important to have up-to-date antivirus software installed and configured to run regularly, only open trusted email attachments, be careful when downloading files, and back up files frequently.
virus and antivirus
a small presentation on virus and anti virus. and its prevention and cure. and also the effects of virus in computers.
Computer virus
The document discusses computer viruses, how they spread and affect systems. It describes how the first virus, called "Creeper, was created in 1970s and outlines common ways viruses enter systems like through email attachments. Different virus types are outlined like memory resident viruses, boot sector viruses and macro viruses that hide in various parts of the system. Symptoms of virus infection and basic prevention tips are provided.
Welcome to my presentation
This presentation introduces computer viruses by defining them as software programs that can copy themselves and attach to other applications and files. It describes three main types of viruses: boot viruses, which infect boot records; program viruses, which infect files like .exe and .sys; and macro viruses, which infect data files like Word documents. The document explains that viruses try to take control of an infected computer system by making copies of themselves and performing potentially harmful tasks without the user's awareness.
Computer virus
There are several types of computer viruses including boot sector viruses, direct action viruses, resident viruses, multipartite viruses, polymorphic viruses, overwrite viruses, space filler viruses, file infector viruses, macro viruses, root kit viruses, and system or boot-record infector viruses. Boot sector viruses infect the master boot record and are difficult to remove, often requiring formatting. Resident viruses store in memory, allowing infection of other files even after the infected program terminates. Polymorphic viruses alter their signature pattern with each replication, making them difficult to identify with traditional antivirus software.
Antivirus PPt
A computer virus is a type of malicious software program that can copy itself and spread from one computer to another. Viruses often disguise themselves as legitimate programs or documents to infect users' computers without their knowledge. Once installed, viruses can damage programs, delete files, display unwanted messages, or slow computers by clogging memory. To avoid detection, viruses may kill antivirus tasks before scanning can occur. Antivirus software works by scanning files for known virus signatures and behaviors. It is important to keep antivirus software up to date, avoid opening suspicious email attachments, only download files from trusted sources, and back up files regularly to prevent virus damage.
Introduction to Computer Virus
This document discusses computer viruses, including what they are, how they spread, how to identify them, and how to prevent them. A computer virus is a type of malicious software that can replicate itself and spread from one computer to another. Viruses often perform harmful actions like deleting files or stealing data. They typically spread through email attachments, downloads, or removable drives. Signs of a virus include computers running slowly, applications not opening, and antivirus software disappearing. The document recommends installing antivirus software and avoiding suspicious websites or email attachments to prevent viruses. It also lists some well-known antivirus programs.
Introduction to computer virus
Malware is malicious software designed to damage or disrupt computers and networks. It includes viruses, worms, Trojans, and bots. Viruses attach themselves to other files and programs to spread. They can damage data, software, and systems. Common types of viruses include boot viruses, TSR viruses, file-infecting viruses, macro viruses, and multipartite viruses. Worms and Trojans are also types of malware. Basic safety measures can help prevent malware attacks, like firewalls, updating software, antivirus programs, and strong passwords.
Computer viruses
Computer viruses are programs that can replicate themselves and spread from one computer to another. They can corrupt files, crash systems, and steal private information. There are several types of viruses including program viruses, boot viruses, macro viruses, malware, worms, Trojan horses, spyware, and spam. It is important to have antivirus software installed and keep it updated to protect against new viruses, and to be cautious of external devices and downloads that could introduce viruses.
Presentation2
A computer virus is a malicious computer program that can copy itself and spread without permission. It can infect computers by being transferred through email attachments, files on removable drives like USBs, or by exploiting vulnerabilities in network file sharing systems. While some viruses only replicate and spread, others are programmed to damage systems by deleting files or reformatting hard drives. Anti-virus software uses virus signatures and heuristics to detect known and unknown viruses, helping to prevent and remove infections. However, users must still regularly update their software and operating systems to patch new vulnerabilities exploited by viruses.
Presentation on computer viruses
This document provides an overview of computer viruses. It discusses how viruses spread by attaching themselves to files and transferring between computers. Various types of viruses are described like boot viruses, polymorphic viruses, macro viruses, worms, and trojans. Symptoms of a virus infection include slow performance, reduced memory, and files becoming corrupted. The document recommends installing antivirus software, regularly updating it, and being cautious of email attachments to prevent and cure virus infections.
Computer viruses and antiviruses PPT
A computer virus is a malicious program that can copy itself and infect computers without permission. It spreads when an infected computer is connected to uninfected ones, such as via a network or removable storage. There are different types of viruses that infect different parts of a computer system. Malware is a broader term that includes viruses as well as other malicious software like spyware, adware, worms, and trojans. Anti-virus software uses techniques like signature matching, sandboxing, and heuristics to identify and remove viruses and other malware from an infected system. Users should practice safe computing habits and use anti-virus software to help prevent and remove virus infections.
Virus & Anti Virus ppt
The document provides an overview of viruses and anti-viruses. It discusses how the first computer virus was created in the 1980s. It then describes common virus symptoms, different types of viruses like macro viruses and worms, and challenges with virus detection. The document also outlines how antivirus software works using virus dictionaries and behavior monitoring. It notes issues like performance impacts, potential automatic renewals, and limitations with detecting new viruses.
Computer viruses
This document defines and describes different types of computer viruses. It begins by defining a computer virus as a program that spreads itself by infecting files and disks without the user's knowledge. It then lists and describes 7 common types of viruses: boot sector viruses, multipartite viruses, worm viruses, email viruses, macro viruses, script viruses, and Trojan horses. The document explains how each type infects and spreads. It concludes by emphasizing the importance of prevention through safe computing practices and using virus protection software.
computer virus and related legal issues
This document discusses viruses and legal protections against them. It begins with definitions of viruses and their types, including resident, non-resident, Trojan horses, worms, and email viruses. It then discusses various virus types like boot sector, program, macro, and multipartite viruses. The document outlines legal issues around virus creation and distribution. It discusses India's Information Technology Act of 2000 and penalties for cyber crimes. It concludes with discussing handling third-party software and analyzing applications for vulnerabilities.
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Computer virus
Computer viruses are small programs that spread from computer to computer and interfere with operations. They are deliberately created by programmers for reasons like research, pranks, attacks, or financial gain. Viruses typically spread through email attachments, downloads, or infected files on removable drives. Symptoms of infection include slow performance, file changes or damage. People can protect computers by only opening trusted email attachments, backing up files, scanning downloads, and using antivirus software.
Computer virus
This document defines a computer virus and discusses how viruses spread and the types of damage they can cause. It outlines symptoms of a virus infection and types of viruses like boot sector viruses, macro viruses, and script viruses. The document recommends installing antivirus software from reputable companies, backing up files regularly, being cautious of email attachments, and avoiding unknown programs as ways to prevent virus infections.
ANTIVIRUS AND VIRUS Powerpoint presentation
This document provides an overview of computer viruses and anti-virus software. It defines what viruses are and how they spread, describes common types of viruses. It then explains what anti-virus software is, how it works to detect and remove viruses, and lists some popular anti-virus programs. It concludes with a brief history of anti-virus software development from the late 1980s onward.
Virus and Anti Virus - Types of Virus and Anti Virus
Computer viruses are small software programs that are designed to spread from one computer to another and to interfere with computer operation. A virus might corrupt or delete data on your computer, use your e-mail program to spread itself to other computers, or even erase everything on your hard disk.
computer viruses power point presentation
The document discusses computer viruses, how they spread, types of viruses, and how to prevent and cure virus infections. Computer viruses are software programs that replicate like biological viruses and can spread by attaching to other files. When files are exchanged between computers, the virus can spread. Viruses can slow down systems, use memory, and even crash computers. Antivirus software can be installed to prevent and remove viruses, and files should only be downloaded from trusted sources.
Copy of antiviruse
Antivirus software scans for, detects, and removes malicious software like viruses, worms, trojans, and adware. It runs continuously in the background to protect the computer. While antivirus software effectively prevents malware damage, it can slow computers and not catch every virus. It is important to keep antivirus software updated to recognize new viruses and protect systems.
Virus part2
This document provides an introduction to computer viruses and malware. It defines viruses and malware, describes how they spread, and outlines some common types including trojans, worms, joke programs, droppers, and backdoors. It explains virus characteristics like being direct-action or memory-resident. The document aims to describe different forms of malware and their potential payloads or capabilities in order to provide safe computing tips to users.
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Welcome to my presentation
This presentation introduces computer viruses by defining them as software programs that can copy themselves and attach to other applications and files. It describes three main types of viruses: boot viruses, which infect boot records; program viruses, which infect files like .exe and .sys; and macro viruses, which infect data files like Word documents. The document explains that viruses try to take control of an infected computer system by making copies of themselves and performing potentially harmful tasks without the user's awareness.
Computer virus
There are several types of computer viruses including boot sector viruses, direct action viruses, resident viruses, multipartite viruses, polymorphic viruses, overwrite viruses, space filler viruses, file infector viruses, macro viruses, root kit viruses, and system or boot-record infector viruses. Boot sector viruses infect the master boot record and are difficult to remove, often requiring formatting. Resident viruses store in memory, allowing infection of other files even after the infected program terminates. Polymorphic viruses alter their signature pattern with each replication, making them difficult to identify with traditional antivirus software.
Antivirus PPt
A computer virus is a type of malicious software program that can copy itself and spread from one computer to another. Viruses often disguise themselves as legitimate programs or documents to infect users' computers without their knowledge. Once installed, viruses can damage programs, delete files, display unwanted messages, or slow computers by clogging memory. To avoid detection, viruses may kill antivirus tasks before scanning can occur. Antivirus software works by scanning files for known virus signatures and behaviors. It is important to keep antivirus software up to date, avoid opening suspicious email attachments, only download files from trusted sources, and back up files regularly to prevent virus damage.
Introduction to Computer Virus
This document discusses computer viruses, including what they are, how they spread, how to identify them, and how to prevent them. A computer virus is a type of malicious software that can replicate itself and spread from one computer to another. Viruses often perform harmful actions like deleting files or stealing data. They typically spread through email attachments, downloads, or removable drives. Signs of a virus include computers running slowly, applications not opening, and antivirus software disappearing. The document recommends installing antivirus software and avoiding suspicious websites or email attachments to prevent viruses. It also lists some well-known antivirus programs.
Introduction to computer virus
Malware is malicious software designed to damage or disrupt computers and networks. It includes viruses, worms, Trojans, and bots. Viruses attach themselves to other files and programs to spread. They can damage data, software, and systems. Common types of viruses include boot viruses, TSR viruses, file-infecting viruses, macro viruses, and multipartite viruses. Worms and Trojans are also types of malware. Basic safety measures can help prevent malware attacks, like firewalls, updating software, antivirus programs, and strong passwords.
Computer viruses
Computer viruses are programs that can replicate themselves and spread from one computer to another. They can corrupt files, crash systems, and steal private information. There are several types of viruses including program viruses, boot viruses, macro viruses, malware, worms, Trojan horses, spyware, and spam. It is important to have antivirus software installed and keep it updated to protect against new viruses, and to be cautious of external devices and downloads that could introduce viruses.
Presentation2
A computer virus is a malicious computer program that can copy itself and spread without permission. It can infect computers by being transferred through email attachments, files on removable drives like USBs, or by exploiting vulnerabilities in network file sharing systems. While some viruses only replicate and spread, others are programmed to damage systems by deleting files or reformatting hard drives. Anti-virus software uses virus signatures and heuristics to detect known and unknown viruses, helping to prevent and remove infections. However, users must still regularly update their software and operating systems to patch new vulnerabilities exploited by viruses.
Presentation on computer viruses
This document provides an overview of computer viruses. It discusses how viruses spread by attaching themselves to files and transferring between computers. Various types of viruses are described like boot viruses, polymorphic viruses, macro viruses, worms, and trojans. Symptoms of a virus infection include slow performance, reduced memory, and files becoming corrupted. The document recommends installing antivirus software, regularly updating it, and being cautious of email attachments to prevent and cure virus infections.
Computer viruses and antiviruses PPT
A computer virus is a malicious program that can copy itself and infect computers without permission. It spreads when an infected computer is connected to uninfected ones, such as via a network or removable storage. There are different types of viruses that infect different parts of a computer system. Malware is a broader term that includes viruses as well as other malicious software like spyware, adware, worms, and trojans. Anti-virus software uses techniques like signature matching, sandboxing, and heuristics to identify and remove viruses and other malware from an infected system. Users should practice safe computing habits and use anti-virus software to help prevent and remove virus infections.
Virus & Anti Virus ppt
The document provides an overview of viruses and anti-viruses. It discusses how the first computer virus was created in the 1980s. It then describes common virus symptoms, different types of viruses like macro viruses and worms, and challenges with virus detection. The document also outlines how antivirus software works using virus dictionaries and behavior monitoring. It notes issues like performance impacts, potential automatic renewals, and limitations with detecting new viruses.
Computer viruses
This document defines and describes different types of computer viruses. It begins by defining a computer virus as a program that spreads itself by infecting files and disks without the user's knowledge. It then lists and describes 7 common types of viruses: boot sector viruses, multipartite viruses, worm viruses, email viruses, macro viruses, script viruses, and Trojan horses. The document explains how each type infects and spreads. It concludes by emphasizing the importance of prevention through safe computing practices and using virus protection software.
computer virus and related legal issues
This document discusses viruses and legal protections against them. It begins with definitions of viruses and their types, including resident, non-resident, Trojan horses, worms, and email viruses. It then discusses various virus types like boot sector, program, macro, and multipartite viruses. The document outlines legal issues around virus creation and distribution. It discusses India's Information Technology Act of 2000 and penalties for cyber crimes. It concludes with discussing handling third-party software and analyzing applications for vulnerabilities.
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Computer virus
Computer viruses are small programs that spread from computer to computer and interfere with operations. They are deliberately created by programmers for reasons like research, pranks, attacks, or financial gain. Viruses typically spread through email attachments, downloads, or infected files on removable drives. Symptoms of infection include slow performance, file changes or damage. People can protect computers by only opening trusted email attachments, backing up files, scanning downloads, and using antivirus software.
Computer virus
This document defines a computer virus and discusses how viruses spread and the types of damage they can cause. It outlines symptoms of a virus infection and types of viruses like boot sector viruses, macro viruses, and script viruses. The document recommends installing antivirus software from reputable companies, backing up files regularly, being cautious of email attachments, and avoiding unknown programs as ways to prevent virus infections.
ANTIVIRUS AND VIRUS Powerpoint presentation
This document provides an overview of computer viruses and anti-virus software. It defines what viruses are and how they spread, describes common types of viruses. It then explains what anti-virus software is, how it works to detect and remove viruses, and lists some popular anti-virus programs. It concludes with a brief history of anti-virus software development from the late 1980s onward.
Virus and Anti Virus - Types of Virus and Anti Virus
Computer viruses are small software programs that are designed to spread from one computer to another and to interfere with computer operation. A virus might corrupt or delete data on your computer, use your e-mail program to spread itself to other computers, or even erase everything on your hard disk.
computer viruses power point presentation
The document discusses computer viruses, how they spread, types of viruses, and how to prevent and cure virus infections. Computer viruses are software programs that replicate like biological viruses and can spread by attaching to other files. When files are exchanged between computers, the virus can spread. Viruses can slow down systems, use memory, and even crash computers. Antivirus software can be installed to prevent and remove viruses, and files should only be downloaded from trusted sources.
Copy of antiviruse
Antivirus software scans for, detects, and removes malicious software like viruses, worms, trojans, and adware. It runs continuously in the background to protect the computer. While antivirus software effectively prevents malware damage, it can slow computers and not catch every virus. It is important to keep antivirus software updated to recognize new viruses and protect systems.
Virus part2
This document provides an introduction to computer viruses and malware. It defines viruses and malware, describes how they spread, and outlines some common types including trojans, worms, joke programs, droppers, and backdoors. It explains virus characteristics like being direct-action or memory-resident. The document aims to describe different forms of malware and their potential payloads or capabilities in order to provide safe computing tips to users.
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Virus and Anti Virus - Types of Virus and Anti Virus
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Computer Viruses
A computer virus is a malicious software program that spreads by copying itself to other computers. It can corrupt or delete data on a computer. Viruses are often spread through email attachments, downloads, and removable media. There are several types of viruses including boot viruses, program viruses, macro viruses, and polymorphic viruses. Symptoms of a virus infection include programs not working properly, critical files being deleted, and the computer running slower. It is important to have antivirus software installed and keep it updated to protect computers from virus infections.
Computer virus_the_things_u_must_know_
1) Computer viruses have become a major concern as internet usage has increased, allowing viruses to spread more easily.
2) There are different types of viruses like file viruses, boot sector viruses, and macro viruses that infect different parts of a computer.
3) Viruses most commonly spread through the internet by infecting files that are then shared online. They can also spread through removable media like floppy disks.
4) To prevent virus infection, users should use antivirus software, avoid opening files from unknown sources, and only run programs from trusted commercial sources. They should also make sure their systems are updated with the latest security patches.
Computer viruses
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
anti_virus
This document discusses computer viruses, anti-virus software, and how to prevent virus infections. It defines a computer virus as a program designed to spread from computer to computer and interfere with operations. Viruses are spread through email attachments and downloads. The document outlines different types of viruses and malicious software like worms, spam, and trojan horses. It also describes how anti-virus software works by scanning files and memory for virus signatures. Key recommendations include using anti-virus software, keeping it updated, and exercising caution when opening attachments or downloads.
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Computer Virus
A computer virus is a malicious piece of code that spreads from device to device and can damage systems or steal data. It replicates like a biological virus, infecting programs and files to disrupt normal functioning or stop a computer altogether. Common ways viruses spread include email attachments, visiting infected websites, and sharing files. Symptoms include slow performance, crashes, and data loss. Antivirus software detects and removes viruses by comparing files to databases of known threats. Basic protection methods involve antivirus software, firewalls, secure browsing, and safe downloading practices.
Computer virus
Computer viruses are programs that spread by infecting other programs and files. They spread through infected data or programs copied from one system to another, or through email and internet files. There are different types of viruses like boot sector viruses, file infecting viruses, and program viruses. Viruses can damage systems by corrupting and deleting files, slowing performance, and erasing data. It is important to use antivirus software to scan for and remove viruses, keep backups, and avoid opening unknown files.
VIRUSES.pptx
A virus is a piece of code that inserts itself into an application and executes when the app is run, allowing it to steal data, launch attacks, or conduct ransomware attacks. Viruses require an infected application to run but worms can operate independently. Computer viruses and worms are often spread through email attachments and downloads and exploit vulnerabilities in software and security settings. Antivirus software, firewalls, updating systems regularly, and caution about suspicious files and emails can help prevent infection.
Computer Virus And Antivirus-Sumon Chakraborty
The document summarizes computer viruses, how they work, common types of viruses, and antivirus technologies. It discusses how viruses infect systems by attaching to files or residing in memory. Common viruses mentioned include CIH, macro viruses, and I LOVE YOU. Methods of virus detection include using antivirus software to scan for signatures in memory and files. Cleaning involves stopping infected systems, recovering from backups, and reinstalling the operating system with updated antivirus software. Regular backups, antivirus use, and cautious email/download practices are recommended.
Computer Introduction-Lecture04
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
Computer viruses by joy chakraborty
This document discusses information security and privacy issues related to computer viruses. It begins by providing background on viruses and their ability to cause damage and disruption. It then defines what a computer virus is and describes how they work, infecting other programs and replicating. The document outlines various ways viruses can be acquired and categories of viruses. It also discusses the lifecycle of viruses and measures that can be taken to prevent virus infections, including using antivirus software and firewalls. The document concludes by covering data security issues, common types of security breaches, and the costs to companies from virus damage.
Virus.pptx
A computer virus is a malicious program that infects other programs by modifying them to replicate the virus. Viruses can spread by downloading or opening infected files from networks, email attachments, disks, or documents. Once active, viruses can damage systems by deleting files, corrupting data, or using system resources. To prevent infection, users should maintain antivirus software and scan any files from external sources.
COMPUTER VIRUSES AND WORMS.pdf
Computer viruses and worms are malicious software programs that spread from computer to computer and interfere with operations. Viruses spread through email attachments and downloads, while worms replicate by exploiting security vulnerabilities to copy themselves to other systems on a network. Common types are executable viruses, boot sector viruses, and macro viruses like the damaging Melissa virus of 1999. Prevention methods include installing antivirus software, keeping systems updated, and using firewalls. Trojan viruses differ in that they do not self-replicate but perform unauthorized actions like deleting or blocking access to data when activated. The first major computer worm was the Morris worm of 1988, which disrupted many systems and led to the conviction of its creator.
Wikis 1 Assingment
Computer viruses are programs that can copy themselves and spread from one computer to another without permission. They can damage programs, delete files, or reformat hard disks. It is important for computer users to know about viruses in order to take steps to avoid infection, such as using antivirus software, maintaining updates, and avoiding opening email attachments from unknown senders.
Computer virus
Computer viruses are small programs that spread from one computer to another and interfere with operations. They are deliberately created by programmers or virus creation software. Viruses enter computers through email attachments, downloads, or infected files on removable drives. Symptoms of viruses include programs taking longer to load, changing file sizes or drive lights flashing unexpectedly. Common types are Trojan horses, worms, and boot sector viruses. Users can avoid viruses by only opening trusted email attachments, backing up files, and using updated antivirus software.
Computervirus
Computer viruses are small programs that spread from computer to computer and interfere with operations. They are often spread through email attachments and can corrupt or delete files. To remove a virus, you can use an online scanner like Microsoft Safety Scanner or restart your computer in safe mode and run a scanner. In addition to viruses, other types of malware include Trojans, worms, and bacteria. Viruses can activate and potentially damage files in various ways like playing sounds, showing pictures, or formatting disks. It is important to have antivirus software and be cautious of suspicious files and downloads.
Cause and effects of computer virus
This document discusses computer viruses including their history, symptoms, risky file types, and types of viruses. It provides details on some of the earliest computer viruses from the 1980s and 1990s. It describes common symptoms of a virus-infected computer like slow performance, crashes, and missing files. Risky file types that could contain viruses are listed as .exe, .pif, .bat, .vbs, and .com files. The different types of viruses are outlined such as file infector viruses, macro viruses, and polymorphic viruses. Examples are provided for some virus types like boot sector viruses and web scripting viruses.
Virus project
This document provides information about computer viruses, including:
- What a computer virus is and how it spreads by infecting files and programs.
- The different types of viruses like direct action, resident, overwrite, and directory viruses.
- The differences between viruses, worms, and Trojan horses.
- Symptoms of an infected computer and what to do if suspecting a virus attack.
- Popular antivirus software options and factors to consider like update frequency and scanning capabilities.
- How antivirus software works to detect, remove, and quarantine viruses to prevent spreading.
- General precautions like scanning removable media and keeping software updated.
Ch. 3 computer virus
A computer virus is a program that infects and disrupts the normal functioning of a computer without the user's permission or knowledge. There are different types of viruses, including program file viruses and boot sector viruses. Symptoms of a virus infection include frequent computer shutdowns and restarts, malfunctioning applications, inaccessible drives, and unexpected error messages. Viruses can spread through removable storage devices, the internet by visiting infected websites or opening email attachments, and through fake antivirus software called "sweepers". It is important to have effective antivirus software installed and keep it updated to detect and remove viruses.
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Proyecto7
- 1. TOPIC: COMPUTER VIRUSES Have you ever been working in your computer and then you open an unknown file you find in the web and suddenly appear a message that tells you that your PC is in danger? Do you know what computer viruses are and how they spread? WHAT ARE COMPUTER VIRUSES? A virus is a malware (a malicious software or badware) that has the objective of damaging the PC without the permission of the computer user. Viruses usually replace the files that can be carried out for the ones that are infected. They take the function of other files that are already saved in the computer, but there are also other viruses that are characterized because they just annoy. Some of the characteristics of the viruses are: *They produce the loss of productivity of the PC, it becomes slow *They produce cuts in the information systems *Damage of data and files *They are able to spread by replicas HOW VIRUSES SPREAD? There are two ways in which your PC can get viruses; they are: 1-The user accepts or carries out the installation of the virus without a warning message. 2-The virus acts by replicas through the net.
- 2. It can be mentioned that there are some ways in which the PC can be infected by the viruses when the user is interacting or working on the computer; some of those are: • Through messages that are carried out in programs • Social messages like the ones that tell you “CLICK ON THIS; CARRY OUT THIS PROGRAM AND YOU’LL WIN A PRIZE” • When you use diskettes, CD’s or the USB and the files that those hardwares contain is infected. • When you install software and you ignore if it has a virus. TYPES OF VIRUSES There are a lot of types of viruses; they vary according to the way they spread, their function, and the way in which they carry out in the computer or in the way they alter the activity of it. Some of the most common viruses are: • The Trojan or the horse Trojan: They steal information and also alter the performance of your PC. There are extreme cases in which other users can control the system of your PC because of this type of virus. • Worms: They are able to duplicate themselves by using the automatic parts of the operation system of the PC that are not visible for the users. • Logic bombs: They are programs that are activated with certain files.
- 3. HOW CAN WE AVOID OR ELIMINATE THESE VIRUSES? There are methods to be used aimed to the risk of getting viruses; they are called ACTIVE AND PASSIVE METHODS. Active method: Antivirus: they are programs that can detect, eliminate and even stop the spread of viruses. The antivirus control de system of the PC and they notified the user when a file or program is possibly infected. Passive method: • Avoiding using hardwares like diskettes, CD’s or USB’s that you consider can be infected. • Do not install pirated softwares. • Do not open messages or emails that are from an unknown address. • Do not open files without knowing the type of file.