I have a problem and I would appreciate it if someone could help me out. I have Windows XP on my iMac for more than a year without a problem. All of a sudden, today, when I went in Preferences-Startup Disk to select Windows Disk to Restart, it wasn't there. I can see the disk on my desktop, Disk Utility and on boot when I press Alt it's there and I can start up on Windows. I really need it to be on the Startup Disk as an option because by Microsoft keyboard doesn't support the Alt solution. I performed repair permissions still nothing. It's not there. Can someone help me out, please?