old guy wrote:

I have no option of 'Local Users and Groups'
And Outlook ran up til 1-2 weeks ago without this burp. Does this not
imply it was set up correctly already?

Were I in your shoes, I'd uninstall and reinstall. I'd also use the account
named "Administrator", the password for which you created when you set up
your PC (if, in fact, you did set it up).
--
Brian Tillman