I have this problem with the FM15:
1. I launch the FM15 in my PC.
2. The game begins with a black screen and a popup from Steam at the bottom right corner of the screen (The images of the sponsors at the beginning of the game does not appear because the screen is black), the popup of Steam never disappears (the popup of Steam disappear only when the FM15 goes normally to the main menu of the game - see step 3).
3. Then goes normally to the main menu of the game.
Please see my
thread in SI forum.
The SI says that Avast is causing this problem in the game (Football Manager 2015) (Please see the
video on YouTube to see the problem in video).