Many times I have run into issues with Microsoft's User Access Controls.  I have been a big fan of simply disabling it.

In Server 2008, the process is just as simple.
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Click the start menu

Type <em>regedit</em> , press enter

Navigate the registry to
<ul>
	<li>HKEY_LOCAL_MACHINE</li>
	<li>SOFTWARE</li>
	<li>Microsoft</li>
	<li>CurrentVersion</li>
	<li>Policies</li>
	<li>System</li>
</ul>
Inside the System folder you will see a key called &quot;EnableLUA&quot;.

Double click that key and change the value from 1 to 0.

Click OK

Then reboot the server and UAC is disabled.