Be sure to check Steam support pages such as
https://support.steampowered.com/kb_...8043-EUJN-5239
I've had to continually stop services, close programs, lower game Options, etc. to keep WotN running. I've even kept a floor fan blowing on the cpu to cool it off. My PC is dual core and getting old. My laptop is quad core and does better but still crashes when there are sudden flashes during combat.
Wouldn't it be nice if we could just play the game?