How to remotely disable User Access Control UAC
To remotely disable UAC, the remote registry service needs to be running on the remote machine. If you are in a domain environment, it is easier to enable remote registry.
Once the remote registry is enabled, open Registry Editor and drill down to HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System
Double click 'EnableLUA' and set the value to zero.
UAC is now disabled on the remote computer.