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sometime, when i trying the fullscreen mode, my keyboard doesn't respond like pressing ECS to exit, alt+enter to exit full screen and many more. but the pad for playing works normally. it's the same when running in full screen or pressing alt+enter to switch windowed to full screen.

what pad plugin are you using? (for both first and second controller)

I face this kind of problem too with GDsx Dx10 with full-screen cannot return to windowed with alt-enter. This is not a problem for me... just use your mouse click on on the screen then only press the (esc) button if cannot .... Spam the mouse and esc button. Then just click execute to continue the game.