Everything is going fine, a load of boats turn up to invade me and I start fighting them but then walkers start appearing on the river and the game freezes and dies. Is there anything I can do about this? Thanks.

Thank you for the reply. :-)Yes, it is a water borne invasion. I have tried going back to an earlier save, that didn't work. The boats don't get to drop any troops, it crashes within a few seconds of my boats engaging theirs. I've had this game since it was new and never had this particular problem before.

Edit: I went back to a further back save so I could get all my warships to the point of invasion and managed to kill them all before it crashed. Thank you. :-)