Hi, this may be also helpful for others: I have found the reason for the problems, which occured especially with FORTNITE while Counter Strike was running without problems. I found out, that a Microsoft service program XBOX Game Bar is starting automatically in the background when a game is started. The start of this Game Bar program in the background makes trouble with some games when you run a resolution higher than full HD. The game crashes shortly after the start of the game. A solution is to change the windows resolution to full hd, start the game and then increase the solution inside the game. A better solution is to disable game bar - Microsoft has a switch for this in the gaming menue. Finally the problem seems not to be caused by AMD and the AMD driver but by the Game bar programm which is part of Windows 11.