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In this case, you will be required to install that particular distribution in order to run the program. However, some legacy games need older DirectX APIs that are since obsolete on Windows 10 and can only be found on DirectX 9.0c or lower. The same goes for DirectX 11 and DirectX 10. Keep in mind that DirectX has backward compatibility – if you have DirectX 12, all the previous runtime distributions should be present on your system.
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In this case, the applicable fix would be to buy a new graphics card (GPU).
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This explicit error message is a sign that the applying engine is unable to use Direct 3D Feature Level version 10.0. The error “Dx11 feature level 10.0 is required to run the engine valiant” appears once the system doesn’t have the acceptable Direct3D Hardware Feature Level needed by the game engine.
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