Okay this is kinda getting out of hand. Whenever my computer freezes, everything stops, except the fans AFAIK. Mouse doesn't move, sound stops, the whole works. This comes with no warning, and it can happen at any time, although it's much more likely to happen when my computer is running under load.
Things that may cause the freeze:
-- Playing Dominion on LoL and be on Mumble (happens consistently)
-- Running tons of flash applications, such as youtube videos, streams, and flash games from Newgrounds
-- Rendering a very long video
I've considered the possibility that something was overheating, but the symptoms of overheating are either not there, or pretty unnoticeable (occasional frame skipping in games). The worst that has happened from a couple gaming marathons was frame dropping from 120+ to 30 or so, but ironically the freezing didn't happen.
What's the fastest way to determine the root cause of the problem?