Did you happen to have made a disk image, prior to the upgrade?
Have you made a disk image since the upgrade?
https://www.windows10forums.com/threads/please-for-your-own-peace-of-mind.794/
I ask, because ....
1. The upgrade does not always go as well as expected
2.. The Rollback also does not always go as well as expected.
Click the start button, click settings, click update & security, from the left column choose "Recovery" the "Go Back" option should be there.
I strongly recommend a disk image.
Minimally, make sure all your critical data is backed up and secure before proceeding.
Hope for the best, plan for the worse.