…huh? Why would there be an app store inside an app store?

To make it easy to access other app stores of course. You can use one web browser to download another can’t you.

No I was just speaking simply. You know what I meant.

Maybe too simply, because I really don’t. Windows didn’t give any warnings about installing any programs until Windows 10 I think. And even then it’s only the truly esoteric and unknown to Microsoft.