Easiest way to Disable Disable UAC ( User Acces Control ) is to modifying registry on the machine.
You may use the attached reg file to Disable the UAC. Simply, double click the registry file and settings will be imported on the machine.
Manual procedure to disable UAC is given below
Click Start, click Run, type regedit, and then click Enter.
If prompted to enter your credentials, click on Yes to continue.
Navigate to the following registry subkey:
In the details pane (Right Pane), locate the EnableLUA key (REG_DWORD type). Double click to Modify. In the Value data box, type 0 (zero), and then click OK.
Exit Registry Editor, and then restart the computer.