MapPoint 2006 registry error

I'm running Vista RC1 and MapPoint 2006 has been running flawlessly for six
weeks or so until the other morning when I got an error message that says,
"Your registry settings for this application were not copied correctly. To
correct these settings, run Setup again for this application from the
location where you originally installed it." Of course, I've done that to
no avail. Did some research on TechNet that pointed to an unholy alliance
with MS Works (which I don't have) and MS Money (which I do) so I followed
those procedures and still no luck.

Now this is really weird! At the suggestion of a friend I installed
MapPoint with UAC turned off. Everything is right with the world. Being
the responsible end user I am (don't laugh, it's true!) I re-enabled UAC and
BOOM! no MapPoint. Just to confirm my suspicions, I disabled UAC and now
MapPoint works.

What's really got me scratching my head is that I've been using MapPoint
2006 for several weeks with UAC turned on and there were no problems. I
really don't want to disable the best protection I have against the dirt
bags of the online world! What might make MapPoint 2006 behave this way?!?

Ideas? Suggestions? Alternative Procedures?

Thanx, ;-)

Lonny