Yay everybody!!!! I finally found a solution to my printing problems. I simply did a system restore back to the 10th June 2020, and BINGO. Printer is working once again.
A big thank you to all who put forward ideas in an effort to help me. I'm afraid to say though, that nothing which I tried worked. But one useful thing which did emerge though was that WUshowhide program. I knew nothing about it until I logged on the the Microsoft Community. So, with a bit of luck, I'll be able to utilize that tool to stop these most recent, yet troublesome updates (KB4559309 & KB4497165) from reloading should they try to.
Thank you all once again for your help.
Cheers for now,
Wayne