Surface Pro Windows 8 allows you to create standard restricted user and unelevated administrator user. But there is a hidden built-in elevated Administrator account with full unrestricted access rights and permission on the tablet and computer.
How to Enable/Disable the Built-in Elevated Administrator Account on Surface Pro Windows 8
* Make sure you have signed in as an administrator user.
* From the Start screen, press the Windows + Q key and type “cmd” in the search box. Press and hold on Command Prompt icon on the left side, click “Run as administrator”. Type the command below and press Enter to enable the built-in administrator account:
net user administrator /active:yes
To disable it:
net user administrator /active:no
* You can also do that in Local Users and Groups. Press Windows + R keys from keyboard, type “lusrmgr.msc” into the run box, and click OK button. Select Users folder, and double-click on Administrator to open its properties. Uncheck the Account is disabled box, then you are able to sign into system using the built-in Administrator.