Do you have the “OneStore” packages on another drive?
It wasn’t until I moved the 100+Gb OneStore to another location that my CTD’s started.
MS tells you to edit the last line in the User.cfg file to reflect the new location. Don’t do it, you will get CTD with 0xc0000005 errors.
I resolved the problem by using symbolic links to point to the remote OneStore folder. Since I started using symbolic links, no CTD’s whatsoever.
The “official” advice of editing the User.cfg file to point to the new location is complete rubbish. Leave the User.cfg alone and just use symbolic links. It solved my problems.
It seems that Msfs has trouble accessing other drives.