Windows 10 Upgrade / Monitor / Display / Video Card issues

I recently experienced the automatic upgrade (dumb owner) to Windows 10 Pro to Version      10.0.14393 Build 14393.

With it, I lost my dual display capability as Windows found my (old) NVIDIA GeForce GT 430 video adapter unacceptable and defaulted to the generic driver.

I eventually realized this issue was permanent and installed a (new) NVIDIA GeForce GTX 950. It generated a Code 43 error that even an hour with ASUS support couldn't solve in spite of installing up-to-the minute drivers for the 950.

I'm now connected to my mother board's video (ASUSteK P8Z68-V LX Rev X.0x with American Megatrends BIOS 0602 dated 09/13/2011. The processor is an Intel Core i7-2600K at 3.40 gigahertz. I have 16 GB Memory.

I have three questions.

1) I doubt the new NVIDIA 950 was faulty; the big question is, do you think my rig is too old to support current video cards?

2) I you think my rig is close enough to being up-to-not-totally-outdated, is there a video card that supports two monitors you can recommend?

3) Should my current mother board support dual monitors?  After removing the NVIDIA 950 and connecting my two monitors to the HDMI and DVI connectors on the motherboard, when the system booted up, both monitors kinda worked in showing the same thing on both screens. After either some time or rebooting, my DVI monitor comes on and shows the ASUS BIOS screen, but no longer works once Windows kicks in.

Thanks for your help.