I just started up my late 2008 unibody MacBook using bootcamp on Windows XP, and the second the desktop showed up, this horrible loud high pitched squeal started emitting from somewhere. It was so loud and I had to cover my ears and back away. I unplugged the power cable, closed it, and nothing would make it stop until I finally got it to shut down. I happened the next time I tried it as well. It keep going until the whole laptop shut down. The noise is so high pitched I couldn't even last a few minutes trying to figure out the problem. It doesn't happen on OS X, and I have some files I want to save on the Windows side, but if I need to reinstall I will. I used my phone to upload a video here, but it's VERY loud so turn down your speaker Any ideas?