Windows 10's install disk is itself bootable and can help us reset the password on a Local Account (not a Microsoft account) of the existing Windows 10 install.
This document doesn't exhaustively detail how to perform every step. It also doesn't discuss consequences of changing a Windows 10 account password, especially when encrypted filesystems are in use. Its intended audience is the user who has researched both (see Credit below as a starting point).
This document also assumes that the existing Windows 10 install is healthy.
This process exploits the fact that our existing Windows 10 install allows us to execute Windows\system32\Utilman.exe
before/without logging in, by clicking on the login screen's icon for Ease of Access (formerly Utility Manager). By renaming cmd.exe
to Utilman.exe
before booting our existing Windows 10 install, we can later get a Command Prompt in the existing Windows 10 install before/without lo