I am running 10.4 and I do a lot of video (Final Cut Pro and DVD Studio). My computer has been hanging up during reboot and after the apple screen I get a complete blue screen. I can still see my cursor from my mouse, and it moves, but nothing else is happening. I tried to force quit and zap the PRAM (if that even helps), but to no avail. Any troubleshooting suggestions from all you Mac wizards out there? I'm at work so PLEASE hurry! Thanks! 