I solved the problem on my own. For those having a ati graphic card, the problem is related (at least in my case) to the file "atig6pxx.dll" in windir/system32 (Our you can search for it).
I've found the solution at this link https://www.youtube.com/watch?v=D0lqBQbPVoo and solved the problem by renaming "atig6pxx.dll" into "atig6pxx.dll.bak" (you need to change the extention of the file.)