Worst Virus In Years Infects 6.5 Million Computers

A computer virus attack that has infected more than 6.5 million Windows PCs this week is one of the worst in years, internet security firm F-Secure said Friday.

In total the worm, which is known as Downadup or Conficker, has infected nearly 9 million PCs since its first version was unleashed two years ago.

'The number of Downadup infections (is) skyrocketing,' Toni Koivunen, an F-Secure researcher, said in an entry to the company's security lab blog. 'From an estimated 2.4 million infected machines to over 8.9 million during the last four days. That's just amazing.'

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