Ok i just put boot camp on my Mac about 2 weeks ago. I put Windows Xp Prof on and have been only useing that... about 4 days ago i started useing Mac then just the other day i went to go on to mac and it was at the Apple loading screen then it shut down and it does this every time i try to go on to mac... it has done this with Windows also and i just reboot camp it but this time i dont know what to do.... can any one help? 