Hello and thank-you, Maxstar.
I've followed your instructions - the following files are attached:
1. SFCFix.txt logfile
2. 2 screenshots of command prompt window showing results from 3 attempts at running sfc /scannow (see comments below)
3. Exported ComponentBasedServicing registry hive file
WHATEVER YOU HAVE DONE APPEARS TO ENABLED SFC /SCANNOW TO RUN SUCCESSFULLY - THANK YOU. I'd be delighted to know what youlve done to fix it.
Other info:
1. First attempt at running sfc /scannow (as per your instructions) resulted in the system hanging @ verification phase 9% complete - Screenshot attached. CPU, Memory and Disk usage stats were all satisfactory. CBS log shows:
At 16:34 hrs "TI: --- Initializing Trusted Installer ---"
At 16:39 hrs "Ending TrustedInstaller finalization"
At 17:55 hrs "TI: --- Initializing Trusted Installer ---" [THE SYSTEM APPEARS TO HAVE AUTOMATICALLY COMMENCED A NEW SESSION ~76 MINS AFTER PREVIOUS SESSION FINALIZED]
At 18:03 hrs "Failed to OpenPackage using worker session [HRESULT = 0x800f0805]
By 19:15 hrs, CBS.log did not contain any additional entries so I manually closed the command prompt window at ~19:19 hrs.
2. Second attempt at running sfc /scanow @ ~19.25 hrs reported:
C:\WINDOWS\system32>sfc /scannow
Beginning system scan. This process will take some time.
Another servicing or repair operation is currently running.
Wait for this to finish and run sfc again.
It would appear that the operations kicked back into life around the time that I closed the cmd window
3. Third attempt at running sfc /scanow commenced at 20:10 hrs and completed successfully at 20:10 hrs. Attached CBS.log file.
4. Having successfully completed the above, the underlying symptom remains: Windows 10 LTSB 1607 does not update - it thinks the updates are not applicable to this computer.