I played around 7-8 hours of skirmish games without any real worries a few days ago. Then I decided to play the singleplayer campaign.. got past the second mission and got a CTD.

Now, whenever I try to start the game it gets stuck on the initial loading screen. The harddrive keeps chugging along like it's working but nothing ever happens. Left it running for over an hour and still didn't get to the main menu. I'm playing on Steam.

What I've tried so far:
Verified the integrity of game files.
Uninstalled and redownloaded the game.
deleted my local savegame files.
uninstalled and installed on another harddrive (SSD).

I don't have another computer to try installing it on, and I don't want to go for a complete format of my OS-drive in the hopes that it'd get this game to work...

so... any other ideas of what I could try?

System specs:
Windows 10.
Intel i5-6600 CPU @ 3.5Ghz
nVidia geForce GTX 1060 6GB RAM.
16GB RAM