The main culprit seems to be the old motherboard. I have been planning a major hardware overhaul. Will probably take your advice and go back to Windows 7 first. Appreciate your quick answer.

After upgrading from Windows 7 to 10 Iexperienced ”Video TDR Failures” about every other week. Theynever happened with Windows 7. I see no relation to heavy graphicuses. It seems to me that they...