To change from Microsoft login to local account login on Windows 10:

On the Windows 10 PC in question, navigate to the Accounts menu. You can do so in a variety of ways (such as taking a winding trip through the Control Panel), but the fastest way is to simply type “accounts” in the search box on the Windows 10 start menu and select “Change your account picture or profile settings” as seen in the screenshot above.

When the Account Settings menu opens, you’ll find a link labeled “Sign in with a local account instead”. Click on that link.

You’ll confirm the account again and be required to plug in the password. Click “Next”.

Enter the local username and password Click “Next”.

The last page is a confirmation of the process and a reminder that this only changes the local login and not your Microsoft account. Click “Sign out and finish”.