This sounds like the problem that I had, My solution is in this topic (end of page 2)
https://www.tenforums.com/installation-setup/7121-windows-10-installation-has-failed-2.html#post304211

Hope...

I've been suffering this problem for ~24 hours and think I've got the fix (at least, this worked for me):
There was a failed Windows upgrade in a $Windows.~BT folder, Windows 10 created a .~BT1...