Brian says:

To turn off UAC

1

Click Start, and then click Control Panel.
2

In Control Panel, click User Accounts.
3

In the User Accounts window, click User Accounts.
4

In the User Accounts tasks window, click Turn User Account Control on or off.
5

If UAC is currently configured in Admin Approval Mode, the User Account Control message appears. Click Cont
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If UAC is currently configured in Admin Approval Mode, the User Account Control message appears. Click Continue.
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Clear the Use User Account Control (UAC) to help protect your computer check box, and then click OK.
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Click Restart Now to apply the change right away, or click Restart Later and close the User Accounts tasks window.

http://technet.microsoft.com/en-us/library/cc709691%28WS.10%29.aspx