"...help you to fix a borked Windows box."
From what I've seen, the #1 use of these rescue distros for Windows users is to remove GRUB so they can once again rebork boot directly to Windows. They can't even be bother to set the default or timeout in GRUB, just right back to Windows present-but-invisible boot loader.
I have no idea what the #1 case is for LInux users, maybe fstab, X...? it could be so many different things considering you're free to do whatever you want (Windows have 2 choices: Windows or... Windows).
Biting the hand that feeds IT
