I just finished upgrading 9 computers from XP to Vista (on the way to windows 7, don't worry) and 3 of the 9 refuse to install Vista SP1 with no relevent error message.
I have used all my google-fu, and tried every "SP1 installation errors" thread I can find, but no luck yet. Has anybody else encountered this problem specifically after upgrading from XP? Any help would be appreciated.