Edge Blocker - is a “trusted” UI App and a core part of the Windows 10 Operating System it sets itself to not only be the default browser, but the default PDF reader too it is deeply integrated in Windows 10, Edge is clearly the application that Microsoft wants you to use by any means. And yet, there are many reasons to stay away from Edge and continue using Internet Explorer or other Browsers.
There is no option to block it but sometimes it can be necessary, for example:
One of our followers has emailed us and asked a way to block Edge because his child use it in restricted Account , his Windows version was Windows 10 Home and he said that he tried all possibilities to block the EDGE but no luck , we coded this App for him and realized many people need it.
Download: 
Edge Blocker 2.0.zip - 1.2 MB