Set the frequency of UAC windows pop-up

On of the most annoying thins in Vista was UAC (user account control), which was designed to provide some security to system, but for experienced user is a pain in the ass.
In Windows 7, number of UAC pop-ups is reduces, more than that, the UAC level can be customized or even disabled:

go to control panel

select user accounts

select change user account control settings

In this window, you can customize the level of user control, if you move the slider down to bottom, UAC windows will never pop-up. The choice is up to you