If you have ever seen the Mac commercial were PC has upgraded to VISTA and has to go through his security guard for every request, then you know how true that is with VISTA’s UAC. It is relatively easy to disable this feature, and can help cure that sense of panic when the screen starts to darken and you think “Oh no what is wrong?”
The first thing you need to do is to go to the start menu and choose Control Panel.
In the Control Panel choose User Accounts.
In the User Accounts window choose User Accounts again.
Once on the “Make changes to your user account” window, choose Turn User Account Control on or off.
This takes you to another window where you uncheck the “Use User Account Control (UAC) to help protect your computer” and press OK.
That should do it! You may need to restart Vista for the changes to take effect. Good luck!