One of the Patrols, I've experienced this one every time I take this particular type. There's always two enemy AI, one pirate AI, and a Tholian AI on my side (was a carrier I think, just a few phasers on it. The mission starts fine, until about 25-30 seconds in where it will cause a kernel error (I think, I'll make better notes next) and I crash to desktop.
Model issue perhaps? Seems about the right time fighters would normally launch too...