I was right after all, formatting my PC did the trick and everything is working even smoother than before!
But this means the graphic card I returned might be O.K., I hope I still get a refund...
I've tried out some game at high resolutions at they work fine, so everything is O.K....
I went to the doctor and she said I might have gastritis, at lest it's not lactose intolerance, I just love diary products!
