Spent the whole day trying to figure this out, maybe someone here would know how to fix it. When I quit itunes all the music is gone the next time I open it. No errors pop up, nothing. So everytime I open it I have to drag all the music back into itunes, create all the playlists again and when I try to sync her nano (Yea its a friends computer) it says its already synced with another computer and has to erase and sync it all again. I tried uninstalling and reinstalling itunes. Tried moving the library and music to another location and pointing itunes to it. I tried just about everything I could think of and still no luck. Any vista users out there have a fix?