How to turn off UAC (user account control) in Windows Vista
Windows Vista introduced a new security feature called User Account Control (UAC).
Generally, it's a good idea to leave UAC turned on, but sometimes you'll need to turn it off (to install some software, re-register PowerPoint, or for other software maintenance tasks).
If so, here's how:
Click the Start button, point to Settings, then click Control Panel.
Click Classic View then double-click User Accounts.
Click Turn User Account Control on or off.
If you see a User Account Control dialog box, click Continue.
Remove the check mark next to Use User Account Control to protect your computer.
Click OK.
When you're done with your maintenance tasks, repeat the same steps, put a check mark next to Use User Account Control to protect your computer and you're done.
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