A few months ago I had a problem with my Macbook Pro, (late 2009 model, 15" 2.53 ghz) that many users with Snow Leopard have, the random 30 second freezes. I simply reset the PRAM and SMC and I never encountered it again. Now, out of the blue, on Sunday (yesterday), I started experiencing these hangs again, but worse. The night before I had been browsing the web and my battery went to reserve and shut down, so I plugged it in and when I awoke and turned it on I started experiencing problems. I figured I would try the same fix, and it almost seemed to make the problem worse. Now if I shut down the computer via "apple -> shut down", then turn it back on and log in etc., from the first few seconds the machine hangs. If I open a folder I get the immediate beach-ball and the machine is un-responsive for anywhere from 1 minute - 5+ minutes. I have read a lot of fixes for this problem, but most of the people's problems resulted from using Safari or Spotlight. I strictly use Firefox and very rarely even open Safari, and I think I've used Spotlight maybe 3 times total, none in the past few months. So far the things I've tried are: - Reset PRAM - Reset SMC - Run Disc Utility and verify, repair etc. (from SL install disc) So I'm wondering right now what can I do? Its finals week right now and im in college so wiping my HD is not an option. I feel like there is just something hanging the computer but I can't find the culprit.