Although I use Linux 90% of the time I do have a Windoze box.
Unfortunately I just installed some software from a DVD that has badly infected my machine.
In fact it's so bad that AVG cannot remove them fast enough, as they seems to be breeding quicker than they're removed. So ..... I've been forced to reset the system back to factory settings and reload any Windows-only applications.
The only good thing is that I haven't lost any data, and it gives me a chance to clean up the Windoze environment.
At least my Ubuntu machine is still working quite happily in its secure Linux world.
You've got to love it!