First, try rebooting the PC to see if this resolves the problem. It appears that OneCare believes that you've connected to a new unrecognized network. If you recently changed your router/modem, this can happen. However, the unresponsive condition of OneCare suggests an internal problem.
If rebooting does not help, and your status remains at risk for the firewall/protect situation, try the
Firewall repair tool - http://social.microsoft.com/forums/en-US/onecarefirewall/thread/e67b1989-afd5-47e5-a393-3a551c7c7e60/And if that doesn't work, 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 ~