How to Change Name on Lock Screen Windows 10?

How to Change Sign-in Account Name on Windows 10

Open Settings.
Click on Accounts.
Click on Your info.
Click the Manage my Microsoft account option.
Sign in to your account if applicable.
Click the Your Info tab.
Under your current name, click the Edit name option.
Change the new account name as needed.

How to Change your Computer's Name in Windows 10

In the About menu, you should see the name of your computer next to PC name and a button that says Rename PC.
Type the new name for your computer.
A window will pop up asking if you want to restart your computer now or later.

How to Change my Welcome Screen Name, Windows 10 Laptop.

Go Settings, Account, Email & accounts, click on the Microsoft account at the bottom, click on Manage, Under your name click on More actions, Click on Edit Profile, Under your name click on Edit name. Make you changes and follow the security, Save.