My old computer, which my mother-in-law is now using for light internet use, has a virus I couldn't remove. I have the recovery disc to install a clean version of XP but I want to wipe out the previous version of XP that contains the bug before installing the new version. I thought I would come here because I believe I'll get a quick answer and avoid considerable frustration. When I try to hit "format" in windows, it tells me I need to dismount the drive or something similar and it doesn't allow the format. I don't see where in the computer set-up menu that I can get just a plain c: (before windows is loaded) so that I can perform the format process. How can I wipe out the previous version of windows? Thanks in advance.