Last night, the last thing my computer did before shutting down was installing KB4556799 and KB4552931.
This morning, it BSOD'd twice in 10 minutes. Each time, I was in a browser (Firefox for the 1st BSOD and Chrome for the 2nd one. )
I could not see what the error message was as the BSOD screen with the frowning face flashed too quickly.
I immediately uninstalled both updates and the problem disappeared.
Anyone experiencing this?