I just flew 2 career flights with the Cessna 172 G1000 and then followed up with a free flight all in the same session and in the Cessna 172 and did not have this crash. This is just crazy and I cannot find a cause but my computer is not getting too hot and there was plenty of clouds and graphical goodness around to have caused an issue. I am going to try a free flight this evening in a different location and see if I have this issue there.