Game crashes 1 minute after startup.

So I've not played in a bit, and I've come back to this game only to find it now CTDs every time I load it.

The CTD happens after almost exactly 1 minute, and it happens whatever I do - whether I stay in the main menu, start loading into campaign, or start up multiplayer. I've verified game files, and while I've found plenty of help threads about this game crashing, none of them are about this type of crash.

I should mention also that I've tried changing window mode - this happens in full screen, windowed, and borderless.