I retried this morning, gave it the name 'debian.org' when asked, used tasksel(?) to select Desktop, office and not much else that I can remember, used 'advanced' for the Xserver, and then as the dog had to go to the Vets and me to the Doctor later, Alison took me to the Post Office to collect my pension and when I came home there was a screen which I 'OK'd' and lo and behold everything works!
What I didn't do was anything to do with my internet connection so the problems must be caused by my giving wrong answers to those. I know the number, user name, and password for my connection to my ISP so it must be the ISO code for UK/GB and the county number. Now I know its my fault I have another go at installing and write down the questions I can't answer or seem to be getting wrong and see if I can find the right answers, I will report my success of failure.