I am moving this thread to the General topic folder.
What error message are you getting when you run the Cleanup Tool?
If you are on Vista, you must save the cleanup tool to your desktop or other location and then right click the tool and select Run as Administrator.
If you are unable to run the tool and cannot remove OneCare, please contact support.
How to reach support (FAQ) - http://social.microsoft.com/Forums/en-US/onecareinstallandactivate/thread/30400b52-7f26-4ba0-bc18-17e305329d90
-steve
Microsoft MVP Windows Live / Windows Live OneCare & Live Mesh Forum Moderator