Enable Built-in Administrator Account
Note that this works the same in all versions of Windows. Just search for cmd and then right-click on the command prompt icon in the Start menu or Start screen.If you are in Windows 8.x or 10 you can right-click on the Start button and choose to open a command prompt that way.
Now type the following command:
net user administrator /active:yes
then press enter
You should see a message that the command completed successfully. Log out, and you’ll now see the Administrator account as a choice.
You’ll note that there’s no password for this account, so if you want to leave it enabled you should change the password.
Disable Built-in Administrator AccountMake sure you are logged on as your regular user account, and then open an administrator mode command prompt as above. Type the following command:
net user administrator /active:no
The administrator account will now be disabled, and shouldn’t show up on the login screen anymore.
