nixos-config/images/windows-rescue/README.md

To Fix Windows Issues

reset password

• use sfdisk -l to list partitions
• find the partition which holds Windows/System32/config
• mount it mkdir -p /media/sda2; mount /dev/sda2 /media/sda2
• cd /media/sda2/Windows/System32/config
• list SAM database chntpw -l SAM
• edit SAM database chntpw -i SAM
• reboot

more details here.