By default Windows 10 comes with a pre-installed administrator account, but for security purposes its disabled. Windows 10 creates two additional accounts, Guest and Administrator and both are deactivated.
Enable Windows 10 administrator account:
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.
1. Right-click start button and run Command Prompt as admin
2. To activate the built-in administrator account, run this command:
net user administrator /active:yes
Enabling the Guest account is completely different than the Admins. If you want to enable the guest account click here…
3. The administrator account is active now. You can log in as admin now.
Note: The admin account its not password protected, This means that anyone with access to the PC can log in as admin. It is highly recommended to protect this account with a password. This can also be done in the command prompt by entering the following line:
net user administrator *
4. Then you’ll be prompted to enter and confirm the password.
5. To disable the account run command prompt as admin and enter this line:
net user administrator /active:no
Tip: if you are running Windows 8, check out this guide.