I ran into an issue on an old computer with a sandy bridge processor after a windows 10 update about a year ago...the video became unstable. The fix was to uninstall Nvidia drivers and use the windows driver. Graphics card is gtx 260.

I believe the latest win 10 updates have broken the video again. Should I roll back the updates? It was stable about 3 months ago but I could even go back by a year or so to when the Nvidia drivers were working.

If I buy a more modern video card will it resolve the issue or will this sandy bridge processor cause issues with any video card on this system?

Looking for some opinions, otherwise itís going to be a process of trial and error. The computer is unusable outside of safe mode as it stands.