Rescatux is a Debian GNU/Linux-based live cd aimed at GNU/Linux and Microsoft Windows rescue tasks thanks to its graphical wizard named Rescapp.

The author recommends balenaEtcher, which is free and available as a portable app here.

Some of the many repairs and fixes available include:

Boot options:
Update UEFI order
Create a new UEFI Boot entry
UEFI Partition Status
Fake Microsoft Windows UEFI
Hide Microsoft Windows UEFI
Reinstall Microsoft Windows EFI
Check UEFI Boot

Windows options:
Restore Windows MBR
Reset Windows passwords
Promote a Windows user to the Administrator role
Reinstall Microsoft Windows EFI
Unlock Windows user

Expert tools:
Gparted
Photorec
Testdisk

Password options:
Change Gnu/Linux Password
Regenerate sudoers file
Clear Windows passwords

Filesystem options:
File System Check (Forced Fix)

GRUB options:
Easy GNU/Linux Boot Fix
Restore GRUB and GRUB2
Update any GRUB2 menus
Update Debian/Ubuntu grub menus

Support options:
Help
Web
Chat
Show log
Share log
Share log on the forum.
Boot Info Script