The game hangs for a very long time, but doesn't crash, and eventually comes back and then hangs again. I can hear my notebook fans slow down during the hang, which might indicate CPU/GPU aren't being used. I got used to it so I just ALT+TAB and go do something else until the enemy has completely fled, since until then it keeps hanging for a couple of minutes, coming back for a couple of seconds and then hanging for a couple of minutes again. The whole process usually lasts half an hour or maybe a bit more. I can tell the enemy has fled completely because my notebook fans go back to speed, so I ALT+TAB back in and resume normal play.