In case anyone else is having similar problems to me,I have now (at last) completely solved it. Purely by persistence, however. Epson have apparently just put new drivers for my model onto their website (or at least the exe file has a different name now) and it all works fine now including the scanner. Not sure whether to be aggrieved it took them so long, or relieved they now have. Relieved, on balance, I think!