Hi @xilolee,
Thanks for the advice; I've tried to follow it.
I followed the link to the GUIDE in your posting. That instructed me to download and run SFCFix.exe, which I did. The result is shown in 2016-06-17_SFCFix.txt, which I have attached. That says it has fixed a problem, which sounds promising. However, that is the same result as I received when I ran SFCFix.exe a few days ago, before I posted here, so I am not celebrating yet.
This morning I ran sfc /scannow again, which resulted in the CBS log file 2016-06-18 CBS.txt. The file is 136MB, so I have tried to share it via OneDrive here;
https://1drv.ms/t/s!ArnaXjIix1kkyQbOxTFqs3ddFPzr.
Please tell me if I have made a mess of sharing it.
Then, I followed your advice and ran
the command dism /online /cleanup-image /restorehealth (from an elevated command prompt). That returned a failure message at the command line, (Error: 0x80240021 DISM failed. No operation was performed). The resulting DISM log is also attached as 2016-06-18_DISM_Log.txt
Please advise what I should do next.
Peter