A new version of an old worm is set to trigger its destructive payload on March 6. Klez.E (w32.Klez.E@mm) is sometimes called the Twin Virus because the worm is used to spread an upgraded version of the ElKern virus (w32.elkern.b). The new version can now infect Windows 98, Me, 2000, and XP, attempting to corrupt files on these systems without changing their sizes.

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