Yesterday, I successfully installed Fallout4: Goty edition, then installed Fallout: London with no issues. Ran the game for roughly 5-6 hours. When I try to launch (From the Fallout: London game card in the GOG Client) I get a black screen on 2/3rds of my screen, and it just sits there.

I have watched this launch with taskmanager, and see it gets to just over 2mb memory and hangs.

If I run Fallout: G.O.T.Y. first, i can load my save and so far, seems OK.

Any thoughts on why running the Fallout: London game card WONT load properly?