Worms
Computer worms are malicious software applications designed to spread via computer networks, they are one type of Malware and the easiest way to get a worm is by opening an email. You won’t get a worm if you install or maybe listen to something on internet, they are mostly found in emails. They are too complex to be detected by the normal Anti-virus, so sometimes you need a special Anti-virus (in most of the time you have to pay to obtain them).
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Computer Worms:
“What is a computer worm”.” 8 Dec 2008 <http://compnetworking.about.com/cs/worldwideweb/g/bldef_worm.htm>.
“Basic Information”.” 8 Dec 2008 <http://en.wikipedia.org/wiki/Computer_worm>.
“Different types of worms”.” 8 Dec 2008 <http://www.virusall.com/worms.shtml>.
“How to avoid a worm”.” 8 Dec 2008 <http://us.mcafee.com/VirusInfo/VIL/glossary_app.asp#w>.