ICT Assigment - Definition of virus computer

1. Viruses, worms and other malicious software cost consumers billions of dollars annually. A virus is a program that infects computer files to harm the computer or to steal data. A worm has similar effects as a virus but it is a self-contained program that does not infect other files. New viruses and worms that affect personal computers are released on a daily basis.

(http://www.ehow.com/about_6596434_personal-computer-viruses-worms.html)

2. Virus is a program that replicates.  In other words, it spreads from file to file on your system and from PC to PC.  In addition, it may be programmed to erase or damage data.

(http://www.kaspersky.com/downloads/pdf/staying_safe_online_home_guide.pdf)

3. A computer virus is a small program written to alter the way a computer operates, without the permission or knowledge of the user.

(http://service1.symantec.com/support/nav.nsf/docid/1999041209131106)s