Windows 10 stuck at "Windows could not complete the installation" after update

I've a clients Windows 10 computer that was in for some simple work.  When I booted it up, it continued with a Windows update.  I'm assuming that it updated from an earlier version of 10 to the 1709 version.  When it finished and rebooted it gave me the message that "Windows could not complete the installation".  I can't seem to get past this and into the Windows desktop.

I've tried "restore previous version" but that gives an error.  I've tried all my usual startup fixes with no success.  I've run Automatic Repair many times with no success.

I tried to use a System Restore Point, but it says that there are none.

Lastly, I was going to try to do a Reset.  When I run that option I end up with "There was a proble resetting your PC.  No changes were made"

I've imaged the drive so I could start from scratch and restore files, but I'd prefer not to go down that path.  Suggestions on how to proceed would be appreciated.
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CompProbSolvAsked:
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Ashok DewanFreelancerCommented:
Have you checked by going to Safe mode.? Does it boot in safe mode by pressing F8.
 
if not use method 5 from below link incase of SSD disks
Check this https://www.digitalcitizen.life/4-ways-boot-safe-mode-windows-10
dfkeCommented:
Hi,

if you turn off the pc when Windows 10 is starting up you should eventually see a message "preparing automatc repair' when you do this a couple of times.

then select:

troubleshoot  and choose "reset this pc".  Now when asked to reset press 'cancel' (Do Not actually reset!). Then select 'continue'.

The pc should reboot and continue with the installation. If it does than it is advisable to create a system restore  point.

Cheers
CompProbSolvAuthor Commented:
@Ashok: no it won't go into Safe Mode either by F8 (I've rarely, if ever, gotten that to work with Windows 10) nor with choosing the option to change startup.  With the latter it just shuts down and is no different on startup.

@dfke: when I choose "Reset this PC" I have no other choices before it attempts to reset.  Fairly quickly it gives the error message and my only choice is to cancel.
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nobusCommented:
if you power it off and restart it 3x it will go into repair mode- giving you options
you could run a chkdsk fromcommand prompt etc...
CompProbSolvAuthor Commented:
I've been to the Command Prompt as part of my "usual startup fixes".

I concluded that this was beyond repair.  I backed it up, reinstalled from scratched, and restored what I could.

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CompProbSolvAuthor Commented:
The other suggestions were generally good advice but didn't apply to this specific situation.
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