No Administrator Account (Windows 8)

Question

I was helping my mom with her laptop because she kept complaining that she had to put a password in every time she logged on. There is only one user on her laptop. I looked online how to remove the log in password and it said to open Run and type netplwiz.
I unchecked the box that said users must enter a password on the top, and it removed the administrator property somehow. Now, whenever a program needs administrative permissions, It doesn't let me click yes to allow. On the bottom it says enter an administrator
password, but no accounts are available because theres only one account on the laptop. I tried to make a guest account instead so she didn't have to enter the password and you need to be an administrator to add users. Is there any way of
getting admin back?
 p.s. I apologize if this is in the wrong category of forums, they're quite unclear to me.

Answer 1

If you're still having a problem with this:
To enable root.
Boot from the Snow Leopard disc. After the menubar appears select the Utilities menu, choose Reset Password. Select the account to reset password and choose System Administrator (root). Enter in the new password and verify it. Save the password, then exit the installer and restart.
At the login window, or if you have it set to auto-login, log out to return to the login window, choose Other... and enter 'root' (all lowercase) as the name, and then the password that you set. In root you will have full access to the system including granting admin rights to the accounts which are standard at the moment. You also will see some additional folders in Macintosh HD you couldn't see before. Do not touch these in any way or you could hurt the OS. Access System Preferences->Accounts, click on the non-admin account and click the checkmark next to "Allow user to administer this computer," then log out and into the account you just gave admin access to again.
To disable root go into Accounts preferences from an admin account, click Login Options at the bottom of the list of accounts, and to the right, click the Join button next to the words Network Account Server..., click Open Directory Utility, click the lock to make changes, and under the Edit menu, choose Disable Root user.
Consult this Apple support article if you get lost.