that reminds me of one of our computers. It went wrong, and we rang up and they said, "use the installation discs." We said, "there wasn't any." They said. "You should've made some using the CD Rewriter." We said, "It didn't have a b*****d CD/RW." They said, "Oh." ideally, you need to get hold of one. I'd suggest wiping the HD, and buying OEM windows and installing it, but i'm sure there's a better way to do it. When a HD i had f**ked up, a mate took it and hooked it up to his, formatted it and reinstalled windows like that.