So my graphics card is a Nvidia 9400 GT so it only supports directx 10 then i look for my directx version and i found out that my direct x was 11 but im sure that it was directx 10 before (because when i saw a youtuber playing tropico 5 and i found it an interesting game so i tried to download it and i found out that it needs dx11 and i have dx10) i think a certain windows update updated my dx 10 to 11 so can u guys tell me how can i downgrade my dx11 to dx10 because almost every game that i play has low fps except flash games or any browser game