I have the same problem. It doesn't matter what I'm doing the touchpad and/or the keyboard (though the touchpad is a much worse problem) can be randomly unresponsive for a few seconds (or in the keyboard's case, for a key or two). If I had to guess, I would say it was actually a processor problem. It is seemingly unaffected by what I'm running, though. I've played with startup and tried the new ALPS driver, but these have not helped. Before I buy a new touchpad (in case it's hardware, which I doubt, I wonder if there are any other possible solutions out there?