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       A computer virus is a small software program that spreads from one computer to another. It might get involve with computer operation. It might be benign or have a negative effect. A computer virus may corrupt or delete data on a computer, use an e-mail program to spread the virus to other computers, and might even delete everything on the hard disk. These effects will cause your computer operate incorrectly. You get them by downloading files you are unsure about in your mail box, attachments sent on messenger or other websites. CDs or USBs can also spread viruses. The best way to deal or prevent viruses is to have an up to date antivirus program and you scan your computer daily.
                                  Work Cited
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“What is virus? – a definition from Whatis.com.” 4 Dec 2008 <http://searchsecurity.techtarget.com/sDefinition/0,,sid14_gci213306,00.html>.