It looks like this was not a one off crash. The game CTD when I tried to enter a house in Bergost.
The game, if installed correctly, is stable on Windows 7 -- you don't need XP or 98. I still say this applies, and you need to investigate and address it:
it could be a hiccup with graphic drivers, or some other Windows/driver glitch.
I entered several other houses in Bergost without experiencing a crash. I then tried to enter the house where I experienced a crash previously. This time, I did not experience a crash.
EDIT: I experienced a CTD while attempting to load a save file. I was in the Red Sheaf at the time.
I find it a bit odd that I didn't start experiencing CTDs until I reached Bergost.