Very recently, while looking for information about how to get to an account with Administrator privileges on my desktop, I read that one should have at least one Administrator-level account in addition to the Administrator account that's hidden by default. Wish I'd known this awhile back, when I was reading a lot of articles about security that suggested that one should never use an administrator account for day-to-day operations. Nowhere in the articles I was reading did it say anything about keeping one non-hidden admin account, and not realizing that I was doing something that was going to mess me up later, I changed my original account from Administrator to Standard User. Now, I find that by doing that, I have lost administrative access to all user accounts.
I have tried, from both my Standard account and the hidden administrator account, to change my Standard account type back to Administrator, but the "Change Account Type" button grays out and it defaults back to Standard User. I have tried creating a new Admin-type account; same result. I am the only user of this computer, and it is in a home setting. How do I return my Standard account to Administrator (or create a new account with Administrative privileges, i.e., a non-hidden Administrative privileges account) that doesn't entail removing and reinstalling Windows? The change took place too long ago to simply revert to the pre-change state. Googling how to do this has yielded no info, except to suggest things that only work if one has not already deleted or changed that original non-hidden admin account. Can anyone tell me how to do this, or point me to where I might find such info?