Wikis 1 Assingment
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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.
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Viruses can spread from computer to computer through removable media like disks and drives, or over networks and the internet. Worms can self-replicate without needing to be transferred, while trojans appear harmless but contain malicious code. Common computer viruses include Melissa, Kangen, and I Love You, and antivirus programs like AVG, Norton, and E Scan help detect and eliminate known viruses. It is important to learn about viruses to protect computers through up-to-date antivirus software, file backups, and safe online practices.
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.
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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.
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OBJECTIVES
Introduction
What Is Virus?
Why Virus Are Called “Virus”?
How Do Virus Spread?
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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
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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
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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.
Computer virus
A computer virus is a type of malicious software or malware that can replicate itself and spread by inserting copies of its code into other computer programs or files. When executed, the virus code can damage programs, delete files, or disrupt the operation of the computer. Viruses spread similar to biological viruses by making copies of themselves that get transferred to other computers or storage devices. Common symptoms of a virus infection include programs running slowly, unexpected computer behavior, and files being deleted or corrupted.
Antivirus!!
Computer viruses are programs that can copy themselves and infect computers without permission. Viruses spread by being transferred to other computers via removable media or over the network. Some people deliberately create viruses for research, pranks, vandalism or financial gain. Antivirus software works to identify and eliminate viruses by scanning files against known virus definitions and monitoring programs for suspicious behavior.
virus
Computer viruses are malicious software programs created to damage computers. Viruses can replicate themselves and spread by attaching to other programs or files that are shared between computers. They can cause systems to crash or delete files. While some are created as art or experiments, most viruses aim to harm users by stealing data or demanding ransom. To prevent damage, users should install antivirus software, regularly update it, avoid opening suspicious email attachments, and back up their data on external media disconnected from their computer.
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.
Introductions To Malwares
This document provides an overview of different types of malware including viruses, worms, Trojans, and backdoors. Viruses can damage or delete files while replicating themselves. Worms replicate endlessly without damaging files. Trojans masquerade as legitimate programs but provide unauthorized access. Backdoors bypass authentication to remotely access systems. The document describes characteristics and examples of each type as well as how they infect systems.
Computer security.pptx
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Viruses
This presentation is prepare by Polite group from GCU Faisalabad.The members of polite group are Syed Mubashair Abid.Ch.Junaid Arshad.Ch.Uzair Zia.Hafiz Jawad Ahmed.
Viruses and antiviruses
This document discusses viruses, antiviruses, and how to prevent virus attacks. It begins with definitions of viruses, malware, and spyware. It then covers virus languages, types of viruses like macro viruses, boot sector viruses, and worms. The document discusses symptoms of virus attacks and methods of prevention like using antivirus software and firewalls. It provides details on Windows Defender antivirus and how to enable secure logon, recognize dangerous file types, and determine when an email can be trusted. It concludes with information on removing shortcut viruses from files and drives.
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- 6. Steps to avoid viruses Nothing can guarantee the security of your computer 100 percent. You can continue to improve your computer's security and decrease the possibility of infection by using a firewall, keeping your system up-to-date, maintaining a current antivirus software subscription, and following a few best practices. Tip: Because no security method is guaranteed, it's important to back up critical files on a regular basis before you encounter a virus or other problems. Steps to help avoid viruses: Avoid opening an e-mail attachment from someone you know, unless you know exactly what the attachment is. The sender may be unaware that it contains a virus. 5. Never open an e-mail attachment from someone you don't know. 4. Subscribe to industry standard antivirus software, such as Windows Live OneCare and keep it current. 3. Visit Microsoft Update and turn on automatic updating. Note: If you've installed Office 2003 or Office XP, Automatic Updates will also update your Office programs. If you have an earlier version of Office, use Office Update. 2. Use an Internet firewall (Note: Windows XP with SP2 has a firewall already built-in and turned on by default). 1.