You can disable User Account Control across the board for all users of a given PC by
navigating to the User Controls section of the Control Panel (in Control Panel➪User
Accounts and Family Settings➪User Accounts) and selecting the option titled Change
security settings. This will load the Change Security Settings window. To disable User
Account Control, simply uncheck the option titled Use User
Account Control (UAC) to help protect your computer and then click the OK button.
Note that you will have to reboot your computer for the changes to take effect.
If you want to disable User Account Control for just a single user, you simply need to
select a single check box in the User Accounts Control Panel. The quickest way is to
open the Start menu and click the picture that’s associated with your user account.
Then, in the User Accounts window that appears, click Turn User Account Control on
or off. You’ll see the required check box in the next window.