This is just to let you know that I still haven't resolved it. I've been through most of the steps but there's always been something tripping me up along the way. I'm intending to have one last try. Unfortunately I have been extremely busy since before christmas and haven't had the time to sort this out. As I don't need the printer/scanner that often it hasn't been a major irritation (yet!), but it has been frustrating especially as this all worked fine on Windows 7.
I will post the results of what may be my final attempt, possibly this weekend.