I don't have any of these problems you say, I have run Vue 6 Infinite and Vue 7 Infinite on a Vista machine for over 12 Months. I run as administrator every time because I set it up right to begin with, i.e. automatically to run in Admin mode and my UAC has been off since day one!!
I've never had to reactivate, ever!

I don't need to do anything special, just double click on my Vue7Inf icon and that's it, up it comes!!

Injustice will be avenged.
Cofiwch Dryweryn.