I also had the same issue during the download of the 100 Gb after reinstallation, two times
now chatting with Nvidia support and following their advices after having decided to reinstall my windows 11 from scratch and in the process to reinstall MSFS and everything
you can see their recommendations at the end if this post , download still in progress, no new crash since a bit more than 1 hour…
https://forums.flightsimulator.com/t/issue-with-graphic-card/544519/76