Open Windows Live OneCare on the PC that is alerting that it is at risk and it will tell you what action needs to be taken.
If you are unable to correct this status or the at risk status is false, 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|MS Security Essentials Forums Moderator ~