Hi all !
It seems that since Windows’ Creators Update, GameRoom might have difficulties starting if you use RivaTuner.
This issue arises only for versions under 7.0.0 Beta; if you do not wish or cannot update, here is how to fix it :
First, check that you indeed have an older version of RivaTuner running by hovering its tray icon.
If its the case, open it, and GameRoom.exe to the program list (it should be located in %APPDATA%/GameRoom).
Just set the detection level to none as shown here :
You can now minimize RivaTuner and start GameRoom !