Method 1: Disable and Turnoff UAC in Windows 7/8 from Control Panel
1. Access User Control Panel from Start Menu -> Control Panel -> User Accounts and Family Safety -> User Accounts.
2. Click on Change User Account Control settings.
3. Move the Slider to Never Notify.
4. Click OK to make the change effective.
5. Reboot.
Method 2: Disable UAC with Registry Editor (RegEdit) in Windows 7/8
1. Run Registry Editor (RegEdit) by typing regedit at command prompt or at Start Menu-> 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 steps 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.