So yesterday I got a notification that there were Navigraph updates, which I ran. I was able to load into the sim yesterday in the morning hours.
Today I went in to the sim to see the new entries in the Marketplace. I got through the BlackShark.AI screen, the update screen, then at the loading screens with the information about the last world update, I got a blue screen, and then the system rebooted. I thought it was a fluke, so I started up again. Again, a blue screen, and then a reboot. I tried various different things, each time met with a blue screen.
Finally, I went and stopped the two Navigraph programs that auto-start. I tried the sim. I got in this time. It appears that the latest SimLink update is causing blue screens when starting 2020.