Sometimes the Event Viewer can give a helpful indication about what goes wrong(not a guarantee though).
I think searching for it should suffice, otherwise press win+ r and type eventvwr in there.
In the event viewer you can select on the left a category. I think it was something like system and then click on the subfolder applications.
There shoold be a red entry saying error logged at the time MSFS crashed. When you click on it, it should give you some cryptic text, which you can post here. This text should include something like Error Code: …
If you see other programs that crashed near the time MSFS did like max. 2min before, then that would be interesting, too.