Next time this happens, immediately open the event viewer and look for clues. This post explains how to use it, but also keep in mind other programs could actually be the cause of crashes and may be indicated in the event viewer as well. I once had CTD issues due to a Logitech program crashing (which I thankfully didn’t need anyway), and a recent AMD GPU driver update that would crash right at the start of the sim (which I rolled back to fix).