I have a computer that is cluttered up with junk and incomplete uninstalls that have gone bad and left shadows of old programs and games on my hard drive. I would like to wipe the hard drive clean and start over like it's a brand new drive, so I can reinstall these things that the computer thinks is already there. See what I did was uninstall some things, but the uninstall went bad and now the game is gone but it's still there in the add/remove programs list, and the computer won't let me reinstall it because it thinks it's installed. If I wipe my computer clean, it'll be like starting with it new. How do I do it? Is it as simple as format c: and then booting up with the windows CD? Is it bad for the hard drive to do what I want to do?