The Game starts but all i see is a black screen and the Game Cursor. What shall I do?
System: WIN7 64bit, GTX 970, newest Driver.

Same problem here, black screen and only a cursor...

There was another post here with the same issue, looks like if you have a special character in your account name on your PC the game doesn't start (An umlat or acented E or something like that)

They had no fix, wait for a patch or change your account name I guess (Create a second account on same machine for the game with no special characters in it would maybe the easiest way?)

Note, at least according to one user I saw, changing your name won't work. You have to create a new account sans special characters.

This is probably because Windows continues to use the original account name in many places behind the scenes when you just change it.

Nope, thats not the case. I have no User or Character in the Account Name or on the PC with Umlaut or something like that.
I´ve reinstalled the game with the new Patch, but it´s still the same: Black Screen and just the Cursor :(
My other 50+ Games all work properly, what the Hell is the matter with that ShitGame?