My mother got a computer through a grant last year and the teacher that was using it quit and took the computer with her. No one knew where the comuter went until recently. The computer was recovered but there are several things going on on bootup. (I"ll look at the start menu shortly). I'd like to reinstall XP and the cd key is on the back of the computer. Do I need to call MS and have them send me out an xp cd? What does this cost? In the meantime can I repair xp using my xp cd?