vista runs great on my machine.
I've got it all set up nicely. Originally i turned off uac but now I left it on and made a normie user account where I do most everything and changed my policy to auto deny iac prompts for normie user accounts. If I need to install some shit or change something I'll just jump into the admin account.
Figured uac is actually a good idea. Now I just don't have to see it unless I feel like it.