To change name of the user accounts on your Windows 10 PC, you can put the following three methods into practice.
Video guide on how to change user account name in Windows 10:
Way 1: Change account name in Control Panel.
Step 1: Access Control Panel/User Accounts and Family Safety/User Accounts.
Step 2: Choose Change your account name.
Step 3: Type a new name in the box and tap Change Name.
Way 2: Change account name in Local Users and Groups.
Step 1: Open Run by Windows+R, enter lusrmgr.msc and hit OK to open Local Users and Groups.
Step 2: Open the Users folder, right-click a user and select Rename in the menu.
Step 3: Type a new name in the name box.
Way 3: Change administrator or guest name in Local Group Policy Editor.
Step 1: Access Local Group Policy Editor.
Step 2: Open Computer Configuration/Windows Settings/Security Settings/Local Policies/Security Options/Accounts: Rename administrator account (or Accounts: Rename guest account).
Step 3: Type new name and hit OK.
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