You are very kind Olddude (and I believe that I have had reason to thank JohnInKansas for help with a previous problem which you helped resolve) I was able to start the download of the ARCO Antivirus programme but, once again, I have had no indication that I have succeeded. There was no "permission button" as such on the page, anywhere.
However I was informed that 100 errors had been fixed and that I should click on a "purchase button" to have the remaining 1600 odd errors also corrected ? The choice on another "button" was to "retain the remaining errors" ?

Look fellows, I am being a pain in the rear I know so feel free to tell me so, I promise not to hold it against you !