I have never been running as administrator and I am indeed using VISTA. I have never had any problem NOT being running as administrator until I made the mistake compacting my database.
I looked around on the links attached and I cant find any of those files on my folder c:program/PokerTrackerV2....
Using Windows Explorer, go to the c:\program files\poker tracker v2 folder. Click on the Compatibility Files folder. Are you saying there are no files there?