I've had this issue only recently and it has only so far come up when playing games, including DOTA 2 and BF3. What seems to happen is I'm doing nothing abnormal, when suddenly my PC locks up, continuing any input it was given and refusing to take any more input, giving me "beeps" (through the speakers and not my system) for every key press from my keyboard after, until it returns to normal. An example, is on BF3. I'm strafing holding S. This issue happens, my character is strafing right, still shooting and I can do nothing but just sit and wait till it's over about a couple of seconds. I'm no expert and I've never ever had this issue before. It's only happened in the past 2 days or so. Can anybody help?