Hi, I have the periodic CPU spikes which a lot of people are experiencing due to problems with the game and USB input devices. By testing all of the above and more, I have determined it is caused by my Arduino Micro handbrake which for some unknown reason Dirt Rally 2.0 doesn't like. It works fine in game and registers ok but whenever it's plugged in it causes periodic 2second CPU spikes. Without it plugged in I get good smooth gameplay and no CPU spikes. It's such a shame this is a problem in this game, I hope you can fix it. FYI my handbrake has never caused a problem or this kind of behaviour in any other game including Dirt Rally 1.0. I'll keep my fingers crossed for a fix.