TweakUAC

TweakUAC gives you more power over the Windows User Account Control (UAC) settings. In addition to enabling or disabling the UAC, TweakUAC also allows you to select the “quiet” mode for UAC.

In the “quiet” mode, the security of UAC is fully enabled, except that when you use Windows as an administrator, you will not see the usual UAC prompts to approve actions that require the administrative rights.