Disabling UAC via GPO

There are four Group Policy settings that you need to configure to effectively disable UAC. They can all be found here:

Computer Configuration -> Policies -> Windows Settings -> Security Settings -> Local Policies -> Security Options

• User Account Control: Behavior of the elevation prompt for administrators in Admin Approval Mode (set to Elevate without prompting)
• User Account Control: Detect application installations and prompt for elevation (set to Disabled)
• User Account Control: Run all administrators in Admin Approval Mode (set to Disabled)
• User Account Control: Only elevate UIAccess applications that are installed in secure locations (set to Disabled)

Source: Subclassed