The second card I tested did not show up as a secondary device. I wish I knew what caused the issue but I had to do a clean install of windows 10 due to a non related hardware issue. After the clean...

It's ok. Thank you for your help :)

I downloaded the latest drivers, deleted GeForce Experience and tried reinstalling the drivers. Still the same error.

Ok, I used DDU to remove the drivers, ran program and rebooted in safe mode.I tried reinstalling the drivers and received the same error (img attached).

Thanks. I will try that now and post results.

Hello. I am on Windows 10 1607 (not a Windows upgrade problem because I've been on the same version with this gfx card for a several months with no issues) I had an update for Nvidia GTX 950...