NovHak said:
The volume isn't necessarily labelled Windows 10, in your case it's likely the C: volume, whose label is "OS". Anyway, if I were you I would not have followed this procedure in the first place, but rather check the users available, as there must be an account with administrator rights created already. Activating the built-in Administrator account is rarely necessary, and no standard Windows 10 installation will leave you with no privileged account.

EDIT :
What did you download ? There was nothing to download there...
Someone posted a repair link; I downloaded but was unable to open because UAC prompted me for permission that I was unable to give because the "yes" button was grayed out.

It became too frustrating and a waste of my time so I went back to Windows 7 for now.

Thank you to all who were so thoughtful and prompt in responding.