I've played FSX:SE since December and I never encountered any problems. It wasn't until last month my keyboard randomly started failing. When I start a new flight the keyboard works perfectly fine but then stops working after a few minutes. I've tried troubleshooting my keyboard, I tried deleting the fsx.cfg, I tried reinstalling the sim and countless other things too. I've been looking for around a month now and becoming more desperate for help just to play the flight sim again.