After downloading Need For Speed Most Wanted sometimes you can see the above error that says ” The application has failed to start because d3dx9_26.dll was not found. Re-installing the application may fix this problem“. In this case you can download that required dll file from here to fix this problem and run the game successfully. Download the DLL file from here.d3dx9_26.dll . It is a zip file. First you need to unzip this file and you will get the …