At the countdown to victory, when it reached 0.0 it got stuck there and froze I could move the cursor and hear the game music it started to rain but the image was frozen, I couldn't pan the camera and it just stood there until I had to close it.
This was single player skirmish. Gameplay was going smoothly except before I started the game, in general loading screens took a while to load especially the first splash screen and after loading into the map - even when the completion bar was finished.
I checked my network connectivity and it showed as excellent strength so I don't know what was up.
Okay, update, I rebooted the PC and restarted the game and got a Server Down message box with Exit to Desktop/Login options. So it was the server.