Just about anyone who’s attempted dual booting or another non-standard boot setup has, at some point, made their own system unbootable. If the words “GRUB Error 2? or “No Valid System Disk Found” make you break into a cold sweat, then fear no more. Now you can include the Super Grub Disk in your geek arsenal, and say goodbye to boot errors. SGD can work with Linux or Windows systems to bypass or repair the broken bootloaders that have kept many of us awake at night, and all in under 2MB. That’s right, it can even run from a floppy disk.