By default this is disabled – here's how to get in
How to log in as administrator in the latest version of Windows 10
By default, the local Administrator account is disabled in Windows 10. There are certain programs that require the user to be logged in with the local administrator account in order to install software or perform an action on the computer. Even though your normal user account is considered an "administrator" account, you will still be prompted by UAC when performing certain actions on the computer.
The built-in Administrator account does not receive the UAC prompts. In this article, I will walk you through the steps to enable the administrator account so that you can log into it in Windows 10.
The first way to enable the built-in administrator account is to open Local Users and Groups. You can do this by right-clicking on Computer or This PC and choosing Manage.