Critical error failed to load d3dx11_42.dll update your DX11 runtime

[TheDTY]

Hey i am a first time dolphin user and once setting up everything i tried to load up a game and the error d3dx11_42.dll came up and could not load a game. I do indeed have directx11 on my computer i am using the OS windows 8 on dolphin 4.02 i changed the back bend to opengl but it just doesnt seem to work very well i was hoping you guys could help me solve my problem. btw the error only comes up when i use backbend dx11