Got a result on my own after badgering Microsoft. They needed to REINSTALL Windows 10 to correct the corruption that was preventing the download. But - of course - my system failed to download the special reinstall Window 10, so the tech had to backdoor and side-load the corrected, un-corrupted Windows 10. Since it was a LOOONG re-install, the tech said he would callback...he did not. If this happens, know that once restarting has finished you will still have to get all your windows 10 updates re-installed, as well.
