To turn ON/OFF UAC

1.Click Start, and then click Control Panel.
2.In Control Panel, click User Accounts.
3.In the User Accounts window, click User Accounts.
4.In the User Accounts tasks window, click Turn User Account Control on or off.
5.If UAC is currently configured in Admin Approval Mode, the User Account Control message appears. Click Continue.
6.Clear the Use User Account Control (UAC) to help protect your computer check box, and then click OK.
7.Click Restart Now to apply the change right away, or click Restart Later and close the User Accounts tasks window.