High Quality Content by WIKIPEDIA articles! MBRWizard is a Master Boot Record (MBR) management application for x86 and x86-64 based computers. As the use of disk imaging applications for backup and operating system deployment began to increase, as well as many users beginning to experiment with dual-booting Linux on existing Windows machines, key entries in the MBR were often changed or corrupted, rendering the machine unbootable. MBRWizard was designed to allow the user to reverse or repair these unwanted, destructive changes to the MBR, effectively enabling the computer to once again boot properly.