then it should be this key.
1. Run Registry Editor (RegEdit) by typing regedit at command prompt or at startmenu->run
2. Locate following registry key:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\System
3. Locate the following REG_DWORD value:
EnableLUA
4. Set the value of EnableLUA to 0.
Optional step to suppress UAC permission prompt dialog,
1. Locate the following REG_DWORD value:
ConsentPromptBehaviorAdmin
2. Set the value of ConsentPromptBehaviorAdmin to 0 (optional).
Now Exit from Registry Editor and Restart the computer.