I actually found a thread on a post here with the same issue and I was able to resolve it. Thank you for your fast reply though!

ilyas_x
@ilyas_x
Posts
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WAW - "Unable to load import 'D3DXCompileShader' from module 'd3dx9_37.dll'. -
WAW - "Unable to load import 'D3DXCompileShader' from module 'd3dx9_37.dll'.I've downloaded the game multiple times, already have BO2 running fine and just repeated the process to download WAW but I continue to run into this error: "Unable to load import 'D3DXCompileShader' from module 'd3dx9_37.dll'. Help would be very appreciated!