Causing close to $100 billion in damage to businesses worldwide, PC viruses have brought the world a massive headache. We name the 10 most destructive of the past 20 years.

Computer viruses are like real-life viruses: When they’re flying around infecting every PC (or person) in sight, they’re scary. But after the fact…well, they’re rather interesting, albeit in a gory kind of way. With this in mind, we shamelessly present, in chronological order, the 10 most destructive viruses of all time.
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