Quote Originally Posted by kleinma
What actions in Vista require an elevation prompt when you are logged in as "administrator" on the local machine?
All usual items as far as I know (I have no way to currently test this and it's been a while since I last logged in as Administrator). The idea of UAC wasn't to prevent people who didn't have the privledge to do something but to let the user know that someone wants to do something that requires a higher level of authorization (whether that "someone" is the user or not).

If they didn't use UAC in an administrator account... well that would basically undo everything they tried to do with UAC in the first place.