COMPUTER VIRUS

A computer virus is a small software program that spreads from one computer to another computer and that interferes with computer operation. A computer virus may corrupt or delete data on a computer, use an e-mail program to spread the virus to other computers, or even delete everything on the hard disk.The first virus was detected on APRANET, the forerunner of the Internet in the early 1970s. Before computer networks became widespread, most viruses spread on removable media, particularly floppy disks. Since the mid-1990s, macro viruses have become common. Macro viruses pose unique problems for detection software.

The newest species of the virus family is the cross-site scripting virus. Cross-site scripting (XSS) is a type of computer security vulnerability typically found in web applications which allow code injection by malicious web users into the web pages viewed by other users. Examples of such code include HTML code and client-side scripts. Most notable sites affected by this XSS viruses have been MySpace and Yahoo.Removing virus can be a very difficult task even for an expert without the help of computer virus removal tools.

Some computer viruses and other unwanted software, such as spyware, will reinstall themselves after the viruses have been detected and removed.Therefore, to avoid this viruses, early prevention should be done. Such as turning on the firewall on the computer and keep the computer operating system up-to-date. Besides that, use an updated antivirus software and use an updated antispyware software on the computer.