Question Author
Greetings again.
It was Mr Fickens who came up with the answer!
I tried everything else, including BIOS settings, although all that was available there was PCI or Integrated: I selected Integrated. Thanks 'bassmanjack'.
What eventually did the trick was found on page 5 of Chuck's link:
Graphics: Intel® Extreme Graphics Driver for 845 Chipset-Based Intel Desktop Boards.
Gawd knows why it didn't show up when I was on there yesterday?
You are indeed a wonderful man!
My thanks to all.
Stay good!
Cheers.