Hi, I recently bought a new laptop with vista buisiness with an xp downgrade intalled (why would you want a downgrade?!). So I re-installed vista, but must have made a mistake because it left xp as an old version of windows. But my C drive is almost full and I need to remove the xp installation. I've tried removing it using the installation disk. I can't actually find a reference to it on C drive, and windows wouldn't let me simply remove the folder if I could. Can CCleaner or anything else help?