I have three monitors on an Nvidia card and they are working fine, but I am seeing a lot of the flickering.
I run GeForce cards..
I use GeForce experience for the updates, I do not use nor ever have used the Microsoft updater choice.
I just tell it to ignore the updates, and that I have it covered.
BTW, If your machine did load a GeForce update and you don’t want it, all you need to do is roll it back.