One of the most annoying things about Vista so far is the plethora of UAC prompts.  I thought I'd try to figure out how to turn off the warnings on CA's anti-virus software, since a couple of these come up every time I start the computer.  Apparently, it's all or nothing right now -- there's no way to turn off the prompts for individual programs.  (See 
this thread for some discussion on that.)  If I was using Vista on my normal home computer, I'd probably get about 10 or 20 of these, given all the programs that load on startup.