Richard darling... much as I would love to fly over to visit - with pc of course... the problem has been (almost) solved by the kind intervention of Pprune Radar who has promised -very kindly - to send me a disc so I can install offline.
I think that the problem lies with the guy who built my pc and subsequently installed my software.... he doesn't seem to have given me any discs to re-install anything - so windows update won't work as I think my version may be slightly Captain Hooked - if you see what I mean....oooops. Big apologies to BRL - the computer may not have made a crash landing from a passing artic - but it looks like the software did....
Thanks to all who've tried to help - fingers crossed for the disc to work... xx