now all I get are BSOD's  

The OP has a Win10XPE USB stick, which can be used to clean install Windows 10.
Clean installation takes no more than 30 minutes, while the troubleshooting has been going on for a week.

Matthew Wai said:

The OP has a Win10XPE USB stick, which can be used to clean install Windows 10.
Clean installation takes no more than 30 minutes, while the troubleshooting has been going on for a week.

Agree 100%. Either make a backup image of the old Windows 10 to recover data files from it, or shrink the old Windows 10 partition by as much as possible and do a clean install to the free space created by shrinking the old Windows partition.

To shrink the old Windows partition, run the following commands:

DiskPart
List Volume
Select Volume C 👉 (Make sure Volume C is the Windows partition.)
shrink desired=409600 minimum=102400 👉 (It will be shrunk by at most 400 GB and at least 100 GB)

b1gt1m, during installation you can also delete all partitions but not the C: partition.

Then choose to install on the C: partition (that has damaged windows). It will be created a Windows.old folder and all existing files and folders will be moved to this folder and then installed a new Windows under C:.
Once installed, you go to C:\windows.old\users"name" and move your files to the new library.
Once done, delete C:\windows.old with all remaining files and folders.

NavyLCDR said:

Agree! Although, my daughter's computer had the same problem a while ago. I took the hard drive out of here computer and put it in my desktop computer. I then used the dism command to "Revert Pending Actions". After that I was able to boot her hard drive in my desktop computer, do all the updates, then re-install the hard drive back into her computer. But that is certainly not guaranteed to work in this case.

How 'Exactly' did you this? I do have another windows 10 desktop I have access to that I can do this on! This may well be the answer to this enormous technical headache!!

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zbook said:

Code:

The boot configuration data store could not be opened.
The requested system device cannot be found.

Code:

Windows resource protection found corrupt files and was unable to repair some of them.

Which of these were found:

Code:

%systemroot%\Minidump
%systemroot%\memory.dmp
%systemroot%\LiveKernelReports
%windir%\Logs\CBS\CBS.log
C:\WINDOWS\Logs\CBS\CBS.log
C:\Windows\memory.dmp
C:\Windows\Minidump
C:\Windows\LiveKernelReports

Consider:
Custom Install Windows 10
How to Restore Files from Windows.old Folder in Windows 10
Clean Install Windows 10

OK I found the cbs.log file, it is 52Mb in size, an no that's not a typo!!! I'm thinking of deleting all the cbs.log files off the disk an then running SFC again. Would you agree?

Alternatively you may be able to change C:\WINDOWS\Logs\CBS\CBS.log > C:\WINDOWS\Logs\CBS\CBS.log.old

Instead of deleting it? There's a 2Mb limit on uploads...

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@NavyLCDR so how did you do it?

You can upload only one file at a time instead of putting all files into one ZIP file to be uploaded.

Also you can use share links (one drive, drop box, or google drive).

b1gt1m said:

Instead of deleting it? There's a 2Mb limit on uploads...

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@NavyLCDR so how did you do it?

I connected her drive to a SATA port and it got a drive letter, say F:. Then the command was:

Code:

dism /Image:F:\ /cleanup-image /revertpendingactions

Then I added the second Windows to my boot menu:

Code:

bcdboot F:\Windows /d /addlast

Then rebooted into the second Windows and it worked.