For some reason my powermac has started to randomly freeze up. It goes to a blue screen then goes back to normal then does it again like 2 seconds later. If does theses two quick freeze up with blue screen like every 10 seconds or so. Ran the hardware test and that came up with nothing. Haven't installed any new sofware/hardware. Anyone have an idea what could be wrong? Thinking about just reinstalling OSX. BTW this post took about 15 minutes to write thats how bad it is.