Hello everybody. I don't own a Mac, but I'm an Apple fanboy as shown in the iPhone forums. I have a PC, and my brother has a MacBook Unibody from November 2008. Every couple of days, or 5 times a day, a dialog box comes up saying he must restart his computer with the power button. It doesn't matter what application he is using. Sometimes before any app is launched it pops up. He sent me photos of the issue. He has Norton on it. Can we fix it, or does it need to go to Apple. Thank You, Nick O!