How to completely modify the user name in win10 system and win11 system

1.win+R Turn on run

2. Type in netplwiz enter

3. Open the user account , Double click the account you want to change the user name （ Such as ：Administrator）

4. In the opened attribute interface, there is a text box with full name , Enter the user name you want in this text box , And click apply

5. Then a warning will pop up , Select Yes after confirmation . Then restart the computer