If you already know your current password and want to change it
Select Start > Settings > Accounts > Sign-in options . Under Password, select the Change button and follow the steps.
Reset your Windows 10 local account password
If you’ve forgotten or lost your Windows 10 password for a local account and need to sign back in to your device, the below options might help you get up and running. For more info on local standard vs. administrative accounts, see Create a local user or administrator account in Windows 10.
Windows 10 version 1803 and later
If you added security questions when you set up your local account for Windows 10, then you have at least version 1803 and you can answer security questions to sign back in.
After you’ve entered an incorrect password: