Maybe get autohotkey, open it with some empty/tutorial script go to key history and it should list what is being pressed... should as i've never has this issue without controller enabled (and boy its annoying when games think sim hardware is a pad and there is no way to tell them not to scroll/rotate stuff without messing in device manager smh).

if not autohotkey, there are other programs that can show inputs live or log them, just gotta google around.