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Thanks again for your reply.
I am running Windows 7 SP1 64 bit. I just had a look at the links you advised me of - talk about spoilt for choice!
I will try to sort it for myself, with your guidance please, and if I have to admit defeat, then I am sure my 'tame techie' will be able to help. Unlike the Answer Bankers, he demands payment!
Sadly, my old mate, joe.s-b, died a couple of weeks ago, he was 92, but he put me in touch with you in the first place.
Many thanks for all your help.