Vista SP-2 is beta. You should remove it and wait for the public release and I personally like to wait a month or so longer to see just how much complaining there is about the pack. MS is famous for releasing fixes for their service/fix packs and truth be told Tech Net and beta testers actually get a list of the known bugs in the service packs. MS knows there are bugs in these packs but feel the benefit realized from the security updates and code fixes outweighs the bugs. Or at least it appears that is the criteria they use to determine when the pack is good enough for public consumption. I hope this helps.