The added security is nice, although its also a nuissance sometimes. Most games I have simply won't run without being run as an administrator, and having to click 'Allow' a lot during the day is annoying at best. I've been able to run Vista with no firewall and anti-virus (as an experiment) for 3 months now, and have only gotten some minor spyware that Windows Defender managed to clean out on its own. Thats a huge positive, compared to XP.
Here is a hunt, activate the super admin (route admin), and make your main account a "standard user" (should have been vista's dufault), You can still install, and run any software but UAC will only prompt for things that are administrative in nature. (Installing, editing system files, etc)
The super admin is a well the "Administrator" and can do anything without a prompt. To activate it, you need to use run as admin on cmd, and run command "net user administrator /active:yes" when you logout you will see the super admin. (Give it a password, will be the password UAC uses from now on).
This is the way I run it on my computer, and my father’s business computer, no spyware or virus to date. And no UAC prompts for everything, you will never want to go back to XP's way of limited user junk.
it's a steaming pile of CRAP that takes up so much resources you'll go blind.
i'm sooner dying before i use Vista for anything other then a anger-releaving-tool ^^;