I've done this before, but I reinstalled Windows last time, so I just created a startup disk.
I don't want to reinstall Windows this time, though. I'm planning on installing Linux (I have it downloaded on another computer, but I'm out of blank CDs. My mom's picking some up tonight).
For some reason, Windows seems to be trying to prevent me from reformatting. When I use the MS-Dos Prompt, it says I can't do it, and when I go to My Computer and right-click on C: and click Format, it didn't work, either.
You guys are more computer-smart than me, so that's why I'm asking here :P