Thank you Lynn and PortlandMT, etc) for your on-going conversation and information.
Over the past several months (following instructions back on Page 10 of this thread) I have been continually stopping the wuauserv process (Task Manager, Services), deleteing the files in C:\Windows\SoftwareDistribution, and emptying the Wastebasket (Recycle Bin!).
Reading the latest entries (Page 16-17 of this thread), I have just checked my version of Windows -> 21H2. I cannot remember if/when I updated (if that is the right word) to 21H2!
I also checked the Windows Update process (Settings, Update & Security, and Activation), and low and behold, it asks if I want to upgrade to Windows 10 Pro - no longer any mention of Windows 11 [except that my PC meets the minimum specification for Windows 11, on the Windows Update page].
So my question is: Am I correct in thinking that I no longer need to keep stopping the wuauserv process (Services, Task Manager) and deleting the files in the SoftwareDistribution directory?
Thanks, Martin.