do you have the 430.39 Nvidia drivers installed?
https://hexus.net/tech/news/software...ting-cpu-time/
they're causing problems. and they've been out a few weeks.
my computers also had 'driver power state failure' BSODs since I updated win10 a week ago, and the network port disappeared. I just re-installed the sound/network/graphics/usb3 drivers and been fine last 2 days.
maybe some of your drivers have wonkeyed too, reinstall the lot even if its the same version, except the nvidia if its 430.39, get a different version for that.