“d3dx9_43.dll is either not designed to run on Windows or it contains an error.”
I’m trying to run Hearts of Iron IV (FitGirl Repack) but the game will not launch. I’ve been troubleshooting this for hours and I’m stuck.
Error Message
When I try to launch the game, I get the following error:
“d3dx9_43.dll is either not designed to run on Windows or it contains an error.”
After clicking OK, the game does not launch.
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My System
• Windows 11 (64-bit)
• Hearts of Iron IV — FitGirl Repack
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What I’ve Already Tried
Visual C++ Redistributables
I initially thought this might be a Visual C++ issue, so I checked and confirmed I have:
• Microsoft Visual C++ 2010 (x86 & x64)
• Microsoft Visual C++ 2016
• Microsoft Visual C++ 2015–2022 (v14)
• Both x86 and x64 versions installed
I also:
• Tried installing Visual C++ 2015–2022 manually
• Got “Another version of this product is already installed”
• Tried repairing existing installations
• Restarted my PC
This did not fix the issue.
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DirectX Attempt
Since the error references d3dx9_43.dll, I understand this is related to DirectX 9.
I tried:
• Running DirectX installer from the FitGirl dependencies
• Attempting to install DirectX manually
However, the error still persists.
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Current Situation
• Game will not launch
• d3dx9\_43.dll error appears
• Visual C++ redistributables installed
• DirectX attempted
• Windows 11 64-bit
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From what I understand, this seems like:
• Missing DirectX 9 file
• Corrupted DLL
• Compatibility issue with Windows 11
Has anyone run into this with HOI4 FitGirl repack before?
Any help would be greatly appreciated — I’ve been stuck on this for hours.