hmmm...didn't know Vista SP1 was being discussed... I got a question, if I uninstall Vista SP1, will my OS be affected somehow??? my pc runs fine, but mostly cause I spend about a full week tweaking the hell of the buggy Vista before SP1 was available, anyway, I have a game I want to reinstall, I had it in my pc but wanted to do a fresh reinstall and add some mods, so I deleted the game, but now it just won't load the installshield wizard, gives me an error, the only change between then (when I originally installed the game), and now is that I added SP1, the game was design to run under XP, and I've already try to reinstalled as an administrator and with XP compatibility with no avail; is it safe to uninstall SP1 and reinstall my game?''will everything function just the way it was before SP1 without any glitch cause of modified files?