Game stucks on FIRST loading screen

[KingZitrus]

Log-files ONLY error message says: "Invalid Enviroment".
Music and sound is playing and Loading-circle on mouse curser is running... nothing happens.

 

[Jack]

Run in Windows XP compatibility mode, check files in Steam and if that doesn't work, reinstall.

 

[KingZitrus]

Run in Windows XP compatibility mode, check files in Steam and if that doesn't work, reinstall.

None worked... what now?

We are 7 friends and 6 of us can play the game without problems.
The 1 with this problem has the same system like us.
strange... i hope we can find a solution!

 

[Skornex]

I've got the same problem, nothing happen in open menu, i heard music and that's all, low resolution and nothing happen, i tried to run in windows XP compatibility nothing, check steam files nothing, reinstall and still nothing :x