I had the same problem. "Start Menu and Cortana " wont start. After many hours with technician and call backs. They reinstalled windows 10. If you don't want to do that creating a new user account...

I ended up calling Microsoft. They took control of my machine. They gave me a new user account, all seemed to work. They called back 2 days later and re-downloaded windows 10 for Home. Right now all...