I keep getting this error..."The disk cannot be partitioned because some files cannot be moved. Back up disk use Disk Utility to format it as a single Mac OS Extended (Journaled) volume. Restore your information to the disk and try using Boot Camp Assistant again." So I've checked and my HD is already a Mac OS Extended (Journaled) volume. I've gone to Disk Utility and verified the HD, verified permissions, and repaired permissions. I don't know what else to do. I don't want to backup the entire drive and format it. PS, this is on the iMac. Any suggestions?