I have tried almost everything that was suggested here but to no avail. My computer still fails at 45% and then rolls back. Kind of getting tired of this. I'm about ready to give up. The latest thing being the removal of wifi and Bluetooth.
It this point I would say .. throw in the towel...
I went through all the steps people suggested.. I removed some software... but in the end it just would not work... I then had a device I now no longer new (with all the applied solutions)...
So I bit the bullet and did a complete reinstall of Windows... While it took a while.. it was start forward and in the end I am at 1709...
I still also say.. Shame on Microsoft .. putting out a badly designed upgrade...
Andy