Here's how you can enable the administrator account in Windows 8. 1. Go to the start screen. 2. Right-click any place. 3. Click the All Apps button. 4. Right-click the Command Prompt. 5. Click the Run As Administrator option. 6. At the command prompt, type in this command then hit Enter: net user administrator /active:yes
For more, see the original article at the link below.
Log on as Administrator in Windows 8 | Help Desk Geek