After trying pretty much everything I could manage to think of, aswell as everything I did read in the forum threads about this problem, I was close to committing suicide. Well, not really. How-ever, I chose to call support via my phone. After about 20 minutes of waiting, I got to talk with this nice guy from US, and told him about the problem and what I had tried to do to fix it.
We agreed that to reinstall the game - with all its patches - would be the smartest solution.
So then, I reinstalled the whole game. And guess what? It works. It didn´t take much over an hour eighter.

For anyone that experiences theese problems, and is unable to fix it in any other way, just go ahead and reinstall it. PROBABLY going to be the least pain in the a$$ and maybe the fastest method aswell.

Let me know if this was helpful!

FOR THE HORDE!