A few days ago the rumours started: every currently-supported version of Windows -- that's -98 to -XP and everything in between -- can be rooted by a novel means which MS regarded as a mystery. It seemed to be an automated, malicious bot which makes it possible to control the target machine via IRC, but it seemed not to replicate itself as a worm would do. Exactly how it finds its way onto the victim's box was not known.
But the number of infections was said to be high, though it was not known if user interaction is required for the 'infection', if that's what it is, to occur, or if the means of dissemination leverages some security vulnerability common to all Windows versions other than users and admins.
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