This article explains how to change the administrator account in Windows 11. It also explains how to disable and rename the default local administrator account.
How to Easily Change Windows 11 Administrator
There are several ways to change the administrator account on Windows 11, including through the Settings app and the Control Panel. Windows 11 can have more than one administrator account, so you can convert a new account to an administrator without converting the current administrator account to a regular user account.
If you want only one administrator account, you need to add administrator rights to a regular user account in an administrator account and then change the current administrator account to a regular user account.
You can also change the administrator name in Windows 11. When you do this, the administrator account will get a new name, but other things, such as the personal files and desktop associated with the administrator account, will not change.