fixboot and fixmbr dont edit any files on the hard disk, just on the boot sector, you shouldnt lose anything at all

thanks so much for all your help. i ended up doing what you asked and it worked out. but just to be on the safe side i had my computer fixed at a computer place becuase i didn't want to risk loosing hundred of dollars on music. so it all worked out in the end. but now my itunes is saying the music cant be found. 18 songs are totally off my computer. they cant be found but the rest are on my computer it just that they cant be played. i know this probably isn't your specialty but do you have any ideas in what to do. tomorrow i am bringing it back and telling them what happened. but any advice?