Check that Terminal Services is running. To do this open Start>Run, type "services.msc" without the quotes in the Run box. In the Services console scroll down to Terminal Services. If Terminal Services is not started double click it and select "Start" then select "Automatic" from the drop down Startup Type menu. If this does not resolve the issue please contact support. How to reach support -
http://social.microsoft.com/Forums/en-US/onecareinstallandactivate/thread/30400b52-7f26-4ba0-bc18-17e305329d90
Jim - MVP Windows Live - Forum Moderator - Live One Care - Live Mesh