If the administrator access is hidden
If the default administrator account for your computer doesn't appear when you start your computer, you can enable this account.
- Right-click the Windows Start button then click Command Prompt (Admin).
- Type net user administrator /active:yes then press Enter.
- Type Exit then press Enter.
The administrator account is now visible when you restart the computer, by default it has no password.
To turn the administrator account off, repeat the above steps, replacing active:yes with active:no
For more information on the administrator account in Windows, visit the Microsoft website.