I just recently reinstalled windows (and so did a friend of mine). In both our cases, GamePadViewer now only works if the browser/obs is in focus. I assume that it's somehow the browser's or Windows' fault, since other online gamepad testers no longer work either. For example: https://luser.github.io/gamepadtest/ https://greggman.github.io/html5-gamepad-test/ https://www.onlinemictest.com/controller-tester/ https://extremerate.com/pages/gamepadtester https://hardwaretester.com/gamepad