I set up our old computer that nobody uses as a linux OS(Debian). But now my brother wants to go back to windows since he "uses" it. I thought it would be just as easy as putting in the recovery disk that it came with and wipe the drive and reinstall windows. After the process was complete linux still boots up, but broken and the ability to use the command aptitude has gone and left the building. Is there a way to go back to windows with/without reinstalling linux?