I just bought an investment software that only runs on Windows. So I bought Windows 7 to install on my Mac. In trying to partition the disk with bootcamp it tells me there are some files that are unmoveable and that I need to back up the disk, reformat the drive, and then restore from the backup. Then try to partition it again. Well, in trying to use disk utility to reformat the option of formating is grayed out. It only lets me erase the unused space on the disk. Is there some security set to allow me to do this, or do I really even need to do this?