Windows 10 Administrator privileges, can't install application, enable the administrator account

To enable the Windows 10 administrator account do the following:

Tap on the Windows-key. This should open the start menu or bring you to the Start Screen interface depending on how Windows 10 is configured on the system.
Type cmd and wait for the results to be displayed.
Right-click no the Command Prompt result and select "run as administrator" from the context menu.
Run the command net user to display a list of all user accounts on the system.
To activate the inactive administrator account, run the command net user administrator /active:yes
If you want to enable the guest account as well run the command net user guest /active:yes
The administrator account is active now which means that you can sign in to the system using it. It is not password protected by default which means that anyone with access to the system can use it to sign in to it