How to block websites WNDOWS 10 and MICROSOFT EDGE (not IE Explorer 11)

Very good glad you sorted it.

Just one other thing though, as you mention the website kept opening pages. I think I would do a scan using Malwarebytes https://www.malwarebytes.org/ just to be sure there isn't something else going on. You can use the free version it is very good at finding troublesome items.

At the moment your can't. Edge is being developed which is why IE 11 is still available for those who have issues they can't resolve in Edge.

If you really want to go down the route of trying to edit the hosts file then it can be done.

Type notepad in search, when it is found right click the result and use open as administrator. Then file > open and show all files. Browse to the folder that has hosts and open the file, make your changes and close and save.

I would create a backup of the original first though (just to be safe). The reason the host file can't be edited normally is because it needs a system administrator and not just a user administrator. It's for your protection.