Here is the fix for "Windows could not complete the installation:
So I managed to get it started up. I turned the computer off and on 3 times to start advanced recovery. Choose advance options. I was about to restore windows (reinstall windows and removing all apps and programs by keep personal files). Select reinstall and keep personal files. And then on the next screeen hit cancel. So I hit cancel at the next prompt. I then selected start windows and it continued installation as normal without the error.
Thank you so much for posting this. I was about to reinstall windows, and this advice got my machine back and past the error. It did take quite a while to finish up the upgrade, but well worth the wait.
Such a huge thank you!!