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Cheers.
Win 7 was updated immediately prior to installing 10 so I can't believe it is from prior to Win 10 installation. And I only updated 10, I think yesterday. I did come down to find the PC has rebooted itself overnight, which was annoying. I'll check your link after I've given the existing game a chance to show it's improved, got worse, or stayed much the same. (My gut feeling is that it is the NVIDIA drivers not coping with the DAI game; some versions worse than others.)