It started this past saturday, and I noticed it first when playing CS GO, which I downloaded the day before. So I had been playing CS GO just fine on Friday. But now, whenever I play, (not just CS, but my other games too, like Far Cry and UT2004) my games sometimes fail to register any keyboard input for up to 30 seconds at a time, or at other times, they will fail to register when I move my mouse around, use the scroll wheel, etc. At first I thought it might be my connection, but then I tried out single player games like the ones I listed and the problem persisted.