7 Most Catastrophic Computer Viruses of All Time

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1. MyDoom

Estimated Damage: $38 billion

The king of the 7 most catastrophic computer viruses of all time is MyDoom, and there are no two different opinions about it. It did no malicious changes to the infected machines. Instead it spread at such a mind-boggling speed, that it slowed down global traffic by at least ten percent and caused billions of clean-up costs.  

Most Catastrophic Computer Viruses of All Time - My doom

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