Windows firewall service corrupt.

Symptoms

1. Windows Firewall/Internet Connection Sharing (ICS) service not listed in Services.msc Console.
2. Windows Firewall/Internet Connection Sharing (ICS) service is listed in Services Console, but you may not be able to start the service.
3. The following error occurs when accessing the firewall settings (firewall.cpl)

Due to an unidentified problem, Windows cannot display Windows Firewall settings.