Hello, I purchased Far Cry 4 about a week or so ago and have been enjoying it so far. However, Just recently a few days ago, the controls suddenly do not work. i press the button to run which is the shift key nothing happens, my character doesn't pull his weapon out, I am unable to enter a vehicle or anything. before it happened I had no issues whatsoever. not sure what the problem could be. I don't have any game pads or any of the sort plugged into my computer. i'm simply using my mouse and keyboard. any help would be greatly appreciated.