Reply 20 of 32, by filipetolhuizen
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wrote:"You have DX12, why do you need DX9 and DX8 compatibility?" ©hardware vendors
I remember a frustrating bug introduced with Forceware 1xx drivers for Windows XP which broke 99% of DirectX 5 and 6 games. It was only fixed in version 2xx, about 3 years later. Forceware 1xx were the worst drivers ever made.
This case might be something to do with primary or secondary D3D devices. MS ACT fixes probably can override one of these GPUs.