The ZE Rescue Disk is a very handy rescue tool to fix damaged or missing hard drive sectors that prevent a computer from booting into its operating system. It runs automatically as a boot-repair rescue tool at startup from the optical drive. ZE Rescue Disk provides what was a missing link in permanently recovering from failed boot sequences. It resolves the problems that cause the GRand Unified Bootloader, or GRUB, to go haywire on systems that have multiple OSes installed. 
