Last night, I upgraded my windows 7 to windows 10 on my desktop. Everything was going smooth, but after restarting machine, login screen was stuck when click on Next button (at right bottom). There was no error message pop-up and computer was restarting after 10-15 minutes. This was weird behavior and there was no clue, what was going behind the scene.
After searching on google, I found a discussion forum, where somebody suggested click “Next” button from keyboard only, which didn’t work for me. Finally, another suggestion about disabling WiFi adapter and restart the machine worked for me.
I removed USB WiFi adaptor and after click on Next button, it continues.
If you end up with similar situation, then it is worthwhile to try this trick.
Screen after Next button