It's the strangest thing. Sometimes the built-in keyboard and trackpad on my MacBook Pro just stop working. System Profiler usually shows the keyboard and trackpad under the USB section, but when they stop working the input devices are removed from the list as if they've been unplugged like regular external hardware. It happens only in the winter to my knowledge and occurs about 4 or 5 times a day on average. Restarting doesn't work however shutting down and powering it back up fixes it (temporarily of course). Apple's support page says nothing about this and the geniuses at the apple stores have never seen it before. Has anyone else with a MacBook Pro ever had this problem and know how to prevent it?