My Mouse keeps suddenly stalling and locking in the one direction unless if I start to move it violently. While holding down W I also sometimes suddenly stop or keep going after I've lifted off the key. This only appears to be happening in mount and blade. Started to happen after I opened up my PC to retrieve information from an old hard-rive. Checked everything for lose wires leading to and from my USB and found nothing. Anyone got an idea what may be going on?