MacBook Pro Freezing Problem
I watched a regular home video with my family and then 5 minutes after, out of nowhere, the computer started freezing. Applications were not the only ones to freeze. The WHOLE computer froze. The mouse cursor had the magic rainbow wheel of death showing most of the time. And 15 minutes later, everything that I clicked in that previous 15 minutes clicked simultaneously. It worked fine for 2 minutes and then the problem continued. I updated my software to the latest one and when I restarted it, the beginning apple sign turned into a circle with a slash, so i had to put in my mac os x install dvd to install snow leopard all over again. it's been continuing, but not as bad. But whenever i try opening more than 2 application, the computer freezes again. I don't think this is a RAM issue because I have 4GB of ram and have used only 100GBs of my 320GB hard drive. I can't see what other factors there are that is causing this problem. Please help!
Mac OS X (10.6.5)