Windows 10: I lost my account admin and sign in says not found

Greetings, I lost my admin user name and when I enter user, it says not found in system, yet when I try to reenter it as new user, it says already in use?

:)

 

How to change admin user account name?

ah so main admin account is 'wizzle' which is what I am currently on
I make another account called 'wizzle2' (with admin rights)
I sign out of 'wizzle' and sign into 'wizzle2'.
And once signed into 'wizzle2', then I do the command prompt step and find the SID for 'wizzle' that is listed and go from there?

 

Admin account and my account on Windows 10 sign-in

When I boot up my Windows 10 desktop, the sign-in screen at the center of the display says, "Administrator" and below that it says that the password is incorrect.

In the bottom left-hand corner there are two listings: "admin" and "myname." I click on "myname" and then at the center of the screen is says my name and below that there's a blank box to enter the password. I enter my Windows password and all is well.

But I don't want to have to do this every time I boot up the computer. I want it to display my name right away and not "Administrator" which I did not create. The myname account is an administrator account.

I've gone into Settings and Accounts and there is only the "myname" account listed. I don't see any "Administrator" or "admin" account.

Some posts have suggested going into Computer Management and clicking on "Groups and Users" or "Users," but there are no such listings under Computer Management in Windows 10.

Any help is appreciated. Thanks.

 

Mail app only working when signed in under Admin account


Upgraded from Windows 7 about two months ago, but this just started a few days ago.
Tried to read my email and found that I could not use the mail app when signed in under my User account. (previously worked fine.)
If I sign in under my Admin account, the mail app works normally.
I've tried deleting and reinstalling the mail/calendar app, and now I don't even have the icons to launch them- not even listed on the start menu, except when using the Admin account.
Is there another way to launch or repair the app?
Any suggested fixes?
Don't want to keep having to sign in as Admin just to read my email.
Thanks!