VanguardLH wrote:

So you need to install a handler for the protocol. That means having to
get one from the MS Store. Or ...

https://winaero.com/blog/get-calcula...in-windows-10/

Thank you for that helpful information.
I installed that winaero free windows 7 windows 8 calc.

It is running now when I press on the "calc.exe" System32 executable.
https://preview.ibb.co/nMhmk9/Clipboard08.jpg

Does anyone know what the Cortana "2" means in the word "Calculator^2"?