Elevation error when trying to enter admin password

Running an application elevated means that you have to use the built-in administrator rights. To do this right click the application icon or its shortcut and select Run as administrator:

The application will now be run using the Windows built-in administrator account rights, not using your local administrator account.

Tutorials:

Run as Administrator in Windows 10 - Windows 10 Forums
Administrator account - Enable or Disable in Windows 10 - Windows 10 Forums

OK, than means that you are trying to run a program elevated from a standard account, not admin account. In that case you have to select the Windows built-in administrator account from the list and use it:

By default the built-in administrator account has no password, leave the password box empty if you have not manually set a password for this account.

If the built-in administrator account is not shown, it means that it is disabled as it by default is. In that case you have to sign in to Windows with a local admin account and go to Computer Management (right click Start, select Computer Management). When there, select Local Users and Groups > Users, and double click the Administrator account to open its properties, or right click it and select Properties:

In Properties dialog unselect Account is disabled and click OK to save the changed properties:

Administrator account - Enable or Disable in Windows 10 - Windows 10 Forums

Now you can go back to your standard Windows user account and select the built-in administrator from the list when you want to run an application elevated.

Kari

Did you try to enable the built-in admin account?

Sometimes it's difficult...

Expand System Tools:

Your system specs are almost complete missing, which makes this a guessing game:

If your Windows 10 is the Home edition, you don't have Local Users and Groups add-on in Computer Management. It is only available in Pro and Enterprise editions.