At one time I tried to install windows xp with boot camp. It wouldn't work so i gave up, deleted the disk partition I had for windows, and made sure that i checked to boot into OS X in system Prefs. But for some reason, Any time I restart the computer it tries to boot into windows I think. It goes to a black screen that says "no bootable device found, please insert install disk and press any key", or something like that. Nothing works, and I have to to turn it off, turn it on, hold option, and click Macintosh HD to boot to(it's the ONLY option, no windows option). It's really annoying to have to do that every single time I restart my computer. Anybody know what's going on?