Has anyone run into this. I have done complete clean installs, no mods running and the game starts fine. I get the Milton start-up poem ok (or Capt. Cox's film if I load it)...when the start up poem ends my screen goes blank where there should be a loading screen and then I hear the music of the main menu, but still have the blank screen.

...I have done 3 fresh installs on my brand new pavillion and still it keeps happening. Everything was fine until I decided to do a fresh install to clean-up and istall new mods.
To recap I am missing load and main menu screens but I can hear the game has loaded ok, but have a blank screen. Any ideas??