can’t be opened using the built-in administrator account

Error example:

Microsoft Edge can’t be opened using the Built-in Administrator account.  Sign in with a different account and try again.

Work around:

1. Security Prompt:
     - Navigate to your local security policy – You can do this by typing secpol.msc at a search/run/command prompt.
     - ENABLE “User Account Control Admin Approval Mode for the Built-in Administrator account“ under Local Policies/Security Options

2. Registry key:     
     - HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System   
     - DWORD value of FilterAdministratorToken value "1"

3. Registry key:          
     - HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\UIPI\
     - DWORD value of Default  "0x00000001(1)"

4. UAC:          
     - Change User Account Control Settings to Notify me only when apps try to ... (default)

5. Restart PC