To answer who asked why it was on Windows: The whole point of this virus, it seems, is to DDoS the SCO site, undoubtedly because of their attacks on Torvalds of recent. Linux users, generally, are much too savvy to 1) download a file attachment they don't know the send of or 2) wait more than one minute to patch their system. But, Windows users a lot of the time leave their computers succeptible to attacks because of a lot of their ignorance, and are thus better targets in this market... basically, the writers think they're too dumb to understand what's going on.