Well, you can always just format the C drive. The worst thing that's going to happen if you don't backup is that you'll lose everything on the desktop and start menu, meaning all the shortcuts are gone. And everything in Documents and Settings will revert back to normal. You can easily format and reinstall windows, by booting from the WinXP cd. Although the dude at Tech Support, keeps telling me that you need an old full version of windows, to do this. You can set boot from CD in BIOS.