I agree with the install process. For such a major company and such a big project I am amazed how non intuitive and non supportive ie. lack of hints, it is.
I pre downloaded what was now obviously the installer onto my 'F' drive. I tried to install from the receipt link but it got to the 'Press any key' page and stopped. Only after a lonnng search online and after an uninstall/reinstall, updated windows10 manually to version 2004 (a very long process of almost 2 hours), updated nvidia drivers, did I find out about the xbox app. I didn't have the 'XBox (beta) App' installed - why it didn't say so beats me. So once I had downloaded and installed onto the 'F' drive it then went past the 'Press any key' page and started the process of downloading and installing - all in all about 3 hours. When finished it has started and run fine.