Any idea why upgrading from Windows 8 to Windows 8.1 would cause a Code 43 for both NVIDEA and Radeon video cards?
I have a Gateway fx6850 desktop that came with Windows 7. I upgraded to Windows 8 when it became available with no problems at all. Eventually, I upgraded to Windows 8.1 and immediately ran into problems with my video card.
I had an NVIDEA GeForce 440 (PCI Express x16) installed, and it triggered a "Windows has stopped this device because it has reported problems. (Code 43)". If I manually disabled/enabled the card the display would change from a very low resolution to a normal resolution, but it would be black - showing a flickering cursor only.
I tried multiple drivers and eventually found one from November 2013 that would work, but with issues - freezing when going to sleep, occasional BSOD, etc.
I tried another NVIDEA card, with multiple drivers. Same problem. So I've been running with the old driver and original card for months, hoping NVIDEA would release a driver that would work. All new drivers have failed.
The BSODs have become more frequent, so I finally tried a Radeon R5 230 card/driver today - still triggering a Code 43.
Given that the PC was released w/ Windows 7, Gateway doesn't offer any drivers specific to Windows 8.1. But everything was working fine with Windows 8. Any ideas?