I've read your article how to solve the problem when Windows 10 couldn't be installed. I am experiencing these problems on a Windows 7 Home Premium with service pack 1.
My computer - when the Windows 10 upgrade process is interrupted - automatically resets to the Windows 7 version and I don't get a set of options and menus as you are informing about. As I am living in the Netherlands the computer I use has a Dutch menu and unfortunately searching for disable driver signatures didn't help me.
Is it possible for you to inform me how I can get to this option - to disable driver signatures - from the Start menu? If you can give me the English menu options I hopefully am able to find them in the Dutch menu (and/or perhaps you can provide me with screenshots).
I hope you can help me and hope that after this soluction I am able to install Windows 10. Thanking you in advance :)