I updated iTunes and QuickTime via/. software update, it asked me to restart, which I did, then it came up with an installing progress bar, when that finished it restarted... into XP So I restarted, and again, went straight to XP. So I restarted again and held Alt, but I wasn't given a choice between Macintosh HD and Windows, but "EFI Boot" and Windows. If I select it and tell it to boot into that volume, it just boots into XP. What the hell is going on?