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Viruses and Anti-Virus

Viruses and Worms

 • Virus:

 A program or   that is loaded onto your computer without your knowledge and runs against your wishes. needed a human action to spread infection.  Can delete important  files, format hard disk, take up system resources that will cause system crash or shutdown.

 • Worms:

 A program that replicates itself over a computer network and usually performs malicious actions. Replicates itself automatically. – Can infect computers by Spyware, Malware, and Email.

What is a virus ?

 A virus is a piece of computer code that attaches itself to a program or a file so it can spread from computer to others computer. It infects as it travels. Viruses can damage your software, your hardware, and your files

. • Virus (n.)

 Code written with the express intention to replicate itself. A virus attaches itself to a host program and then attempts to spread from computer to computer. It might damage hardware, software, or information

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. • 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. • Viruses are most easily spread by attachments in e-mail messages or instant messaging messages. That is why it is essential that you never open e-mail 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. • Viruses also spread through downloads on the Internet. They can be hidden in illicit software or other files or programs you might download.

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