- Load the recovery and troubleshooting environment, e.g. by clicking on ”Repair your computer” during Windows Setup if you boot from Windows installation media.
- Select Troubleshoot > Command Prompt.
- Switch to the drive letter that Windows is installed on and there in the system32 directory, e.g. cd c:\windows\system32
- Type rename utilman.exe utilman.bak.
- Type copy cmd.exe utilman.exe.
- Restart the computer and boot from the Window installation this time.
- If you run Windows 10 version 1803 or earlier, click on the Ease of Access button to open a command prompt window.
- If you run Windows 10 version 1809 or later, do the following first:
- Hold Shift-key on the keyboard and click on the Power button to select Restart.
- After the Restart, hold down the Shift-key again and select Restart from the Power menu again to boot into startup repair.
- Select Troubleshoot > Advanced Options > Startup Settings > Restart
- When the Startup Settings screen appears after the Restart, select 8) Disable early launch anti-malware protection.
- Click on the Ease of Access button on the next start on the login screen to open the command prompt window.
- Type net user to display the names of all user accounts.
- Use the command net user [username] [password] to change the password of the account, e.g. net user martin qwerty123456 to change the password of the user martin to qwerty123456.