I have a late 2008 MBP running Mountain Lion and yesterday I started having a weird problem. Completely out of nowhere, it starts freezing. I'm not sure if its a hardware or software problem, as my mouse still moves but I get the spinning beachball and an unresponsive Finder. The only solution to get it working again is to restart it. I have noticed it usually starts about 10-15 minutes after I start it up. I have tried repairing the disk as well as permissions, but have had no luck. Anybody have some advice?