Feel a bit silly now - read some other stuff, explored, and changed the movies from the default W10 app to WMP and now it works.
Thanks for the help, though.
Actually, it worked once, and now it doesn't. Straight after 'feeding the giant kaltors', it thinks about windowing it for a second, then jumps to a blank screen with the sounds of the movies playing but nothing showing. Which makes it a little hard to play. The one time it did work, it told me it was all up to date, so that's a bonus. But the windowing meant that the buttons for the game settings were off the bottom of my screen, so I had to exit.
So it's a resolution issue, I think. I've tried tinkering with the startup.ini, but that doesn't change anything and sometimes stops the game launching.
Again, any ideas? Otherwise, I'll try the tech support, but as I bought it 4 years ago and have no idea what the order number is, and have a different email now, is that going to be an issue?
< Message edited by Pukako -- 1/6/2016 7:53:54 AM >