Yep, it seems that Windows 10 changed hash encryption and many password cracking tools become useless: https://www.passcape.com/index.php?section=blog&cmd=details&id=35 But you can reset forgotten password by booting off Windows setup DVD: https://lifehacker.com/5612487/hack-the-sticky-keys-feature-to-reset-a-forgotten-windows-password https://www.top-password.com/blog/reset-windows-10-password-with-sticky-keys/ This is a backdoor that wasn't patched yet.