Fix error message: this app can't be activated by the built-in administrator window 10 or window 8

Open Local Group Policy Editor

    Windows + R
    Type Gpedit.msc

Go to the following Policy
    =>Computer Configuration
        =>Windows Settings.
            =>Security Settings.
            =>Local Policies.
               =>Security Options.

Click on: User Account Control:Admin Approval Mode for the Built-in- Administrator account.
Enable the Policy

reboot/logoff
======================
https://feelsecured.wordpress.com/2013/12/07/how-to-solve-error-this-app-cant-be-activated-by-the-built-in-administrator-in-windows-8-1/