I had OS 10.3 when I started experiencing random freezes and crashes. It first happened when I went online to check my email so I assumed it was the browser or something internet related. I upgraded the OS to 10.4 but that didn't help. The crashes also happen randomly (going to the dock, opening another program, opening a folder, clicking on a file, etc.). I tried zapping the PRAM, removing all preference lists, creating a new user and going under that, unplugging anything attached to the Mac... but the computer still crashes. I don't know what to do, I've only had this Mac for 2 years and up until a few weeks ago it was fine. But I didn't install anything or do anything different to warrant crashing. Can anyone help or tell me what to do?