Taking Windows 10 system as an example, the method of changing the administrator user name is as follows:

1. Right-click the "This pc" icon on the screen and click the "Manage" menu item in the pop-up right-click menu;

2. Enter the computer management window and click the menu item "Computer Management/System Tools/Local Users and Groups" in turn;

3. Click the "Local Users and Groups" menu item, and then click the "Users" menu item in the expanded collapsed menu;

4. At this point, all login accounts will be displayed in the window on the right. Right-click the account to be modified, and click Rename in the pop-up right-click menu.

5. At this point, the original user name becomes modifiable;

6. Enter the required user name, and then press Enter.