I can't shake the feeling there is something going on with your Vista validation/authorization. Might be time to contact the Mothership since only they know how their anti-piracy "feature" actually works.

Try this. Download and run this diagnostic:
http://go.microsoft....fwlink/?linkid=52012If you get anything strange or odd looking in the diagnostic report, and the "resolve" button doesn't fix it, web over to this support link:
http://social.micros...enuinevista/threads/Follow the instructions in the "Please Read Before Posting" announcement to submit your report for support assistance.
Alternatively, you could download Vista SP1 Stand-Alone (huge file!) and try reinstalling it, but I'd do the diagnostic thing first.
Let us know how you make out.
