In the User Accounts window, click User Accounts.
In the User Accounts tasks window, click Turn User Account Control on or off.
If UAC is currently configured in Admin Approval Mode, the User Account Control message appears. Click Continue.
Clear the Use User Account Control (UAC) to help protect your computer check box, and then click OK.
Click Restart Now to apply the change right away, or click Restart Later and close the User Accounts tasks window.
That way or this way
1. Launch MSCONFIG by from the Run menu.
2. Click on the Tools tab. Scroll down till you find "Disable UAC" . Click on that line.
MSCONFIG - Disable Account Protection
3. Press the Launch button.
4. A CMD window will open. When the command is done, you can close the window.
5. Close MSCONFIG. You need to reboot the computer for changes to apply.
You can re-enable UAC by selecting the "Enable UAC" line and then clicking on the Launch button.