15 Worst Computer Viruses in History. Learn some interesting and amazing facts about computer viruses. From holding your files ransom to grounding military aircraft, we count 15 of the worst and most damaging computer viruses in history. Including many types Worm, Trojan and Virus, this top 15 list will leave any computer trembling in their case.

This top 15 list of computer viruses includes:

CyrptoLocker,
Anna Kournikova,
Sasser & Netsky,
Klez,
Conflicker,
CIH Chernobyl,
Nimda,
LeapA,
Storm Worm,
Melissa,
Slammer,
Code Red,
ILOVEYOU,
SOBIG.F,
MyDoom

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