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Computer virus

Computer virus . Done: Aaesha Mohammed ID: H00202574. Outline: . What is a computer virus ? Worm E-mail Viruses Types of Viruses Symptoms of Virus Attack How the attack computer How to protect the computer. What is a computer virus ?.

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Computer virus

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  1. Computer virus Done: Aaesha Mohammed ID: H00202574

  2. Outline: • What is a computer virus? • Worm • E-mail Viruses • Types of Viruses • Symptoms of Virus Attack • How the attack computer • How to protect the computer

  3. 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.

  4. Worm • Copy of the worm scans the network for another machine that has a specific security hole. • Copy itself to the new machine using the security hole and start replicating.

  5. E-mail Viruses • Moves around in e-mail messages • Usually replicate itself by automatically mailing itself to dozens of people in the victim’s email address book. • Example “MELISSA VIRUS”

  6. Types of Viruses • File infector virus • Infect program files • Boot sector virus • Infect the system area of a disk • Master boot record virus • infect disks in the same manner as boot sector viruses. The difference between these two virus types is where the viral code is located. • Multi-partite virus • infect both boot records and program files • Macro virus • infect data files. Examples: Microsoft Office Word, Excel, PowerPoint and Access files

  7. Symptoms of Virus Attack • Computer runs slower then usual • Computer no longer boots up • Screen sometimes flicker • PC speaker beeps periodically • System crashes for no reason

  8. How the attack computer • can be disguised as attachments of funny images, greeting cards, or audio and video files. • Computer viruses also spread through downloads on the Internet.

  9. How to protect the computer • Upload the latest updates  • Antivirus tools • Stay informed about recent threats, • Run your computer as a standard user (not as administrator • Follow a few basic rules when you surf the Internet, download files, and open attachments.

  10. Refernces • http://www.webopedia.com/TERM/V/virus.html • http://en.wikipedia.org/wiki/Computer_worm • http://computer.howstuffworks.com/virus4.htm • http://www.makeuseof.com/tag/types-computer-viruses-watch/

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