One method to gain access to a Windows computer when an existing password is lost

If an existing password is lost with a Windows computer, one option in the past was to use a Linux-based option such as http://www.chntpw.com/.  But this method may not work if the computer is configured to use UEFI and cannot be modified.  Below is one option that may be able to resolve the situation.

Boot off a Windows 11 USB

When the Windows Setup screen appears, press SHIFT+F10 to launch a CMD window

Verify the local hard drive letter such as D:

Type ren d:\windows\system32\utilman.exe utilman.exe.bak and press the ENTER key

Type copy d:\windows\system32\cmd.exe d:\windows\system32\utilman.exe and press the ENTER key

Exit the Windows 11 setup

Boot normally to the local drive

At the Login Screen click the EASE OF ACCESS icon (beside the Power icon in the bottom right corner of the screen). This should launch a CMD window

Type net user accountname /add and press the ENTER key

Type net localgroup administrators accountname /add and press the ENTER key

Press ALT+F4 to close the CMD prompt

Click the Power icon (bottom right corner of the screen) and select RESTART

Sign in as accountname without a password