Post some screenies so we can help you any further.
who can help me when i play online my game crash to window. what i need to do?
i play 5 minuts and my game is going to window ther come nothing on my display
I have trouble understanding your problem. Does it go back to Windows (the game crashes completely) or does it just go to window-mode?
If it goes to window-mode then something is hogging the focus. Maybe an antivirus tool. So to come back to full screen mode just press ALT + Enter
Ok i had this but i changed my UPnP to disabled and it seems to have done the job