Many thanks for that, Cogden. I got the technical info at Adobe, followed instructions and hey presto, success. It's a bit of a chore and you need to be very careful to remove ONLY files relating to CS3. I had unstalled the beta version and therefore couldn't deactivate it first as recommended, but this didn't prove to be a problem. Also, some files you expect to be there may have been deleted through the WINDOWS/CONTROL PANEL/ADD-REMOVE procedure. In that case, just go ahead and continue deleting whatever is on the technical sheet list. Incidentally, I saw on some site that Adobe are about to bring out a script to do sort out this problem as they have done for MAC users.
Thanks again,
Seamus