Greetings,
 
If your main (only) Win 10 Account ever gets corrupted,
(I’ve seen it happen in rare instances)
it’s always a good idea to have previously enabled the hidden Administrator account, because,
from the admin account you can create an other personal account if the main account is unfixable.

Here’s how: from: https://www.ghacks.net/2014/11/12/how-to-enable-the-hidden-windows-10-administrator-account/ 
 
(With some slight modifications for clarity)
  1. Hold Down Windows Key and Type R”"
  2. Type lusrmgr.msc and select the result that is returned to you.
  3. Left-click on "Users" to open it, in the left sidebar. You get a list of all accounts of the local system on the right.
  4. Right-click on Administrator and select Properties from the context menu.
  5. Remove the checkmark from "Account is disabled" on the Administrator Properties window and click apply, then ok.
 
I also suggest checking the box that says
“ Password never expires”
 

Steve Karl 412-441-4349