Q. How can I disable UAC (User Account Control) in Windows Vista?

If you wish to disable UAC (User Account Control), you can make any one of the following changes and restart your computer:

- Use the Tools tab of MSCONFIG to launch Disable UAP.

- Use Control Panel / User Account and Family settings / Add or remove user account to select any account. Then select Go to the main User Account page / Change security settings to unselect Use User Account Control (UAC).

 - Use group policy at Computer Configuration / Windows Settings / Security Settings / Local Policies / Security Options to set the following:

              User Account Control: Behavior of the elevation prompt for...   No Prompt
              User Account Control: Behavior of the elevation prompt for...   Not Defined
              User Account Control: Detect application installations and ...  Disabled
              User Account Control: Only elevate executables that are sig...  Not Defined 
              User Account Control: Run all administrators in Admin App...    Disabled
              User Account Control: Switch to the secure desktop when p...    Not Defined

- Use the registry by opening a CMD.EXE window and running:

REG ADD HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System /V EnableLUA /T REG_DWORD /F /D 0