http://social.microsoft.com/Forums/en-US/onecaregeneral/thread/732e6371-2e71-479a-8cd6-b189941ed4fb
When you save the tool to your desktop, you must then right click the tool and select "run as administrator" to execute it.
-steve
~ Microsoft MVP Windows Live ~ Windows Live OneCare| Live Mesh|MS Security Essentials Forums Moderator ~