d3dcompiler_43.dll Missing Error: Fix With DirectX Runtime
Independent guide — no official affiliation with the platforms mentioned.
Short answer
d3dcompiler_43.dll is a legacy DirectX 9 component that old games rely on and Windows 10/11 does not install by default. Running Microsoft's official DirectX End-User Runtime web installer loads every missing d3dx/d3dcompiler DLL at once and permanently fixes the error. Updating your graphics driver is also recommended for overall DirectX stability.
Official source
microsoft.com
d3dx9_* ve d3dcompiler_43 gibi legacy DirectX 9 bileşenlerini Microsoft'un resmî web kurulumuyla yükler.
01 — Step-by-step fix
Step-by-step fix
STEP 01
Download the DirectX End-User Runtime
Get dxwebsetup.exe from Microsoft's official download page (id=35). This web installer detects which legacy DirectX components are missing on your system.
STEP 02
Complete the setup
Run dxwebsetup.exe, uncheck the Bing bar offer if you do not want it and continue. Setup downloads missing d3dx9_xx.dll, d3dcompiler_43.dll and XInput components.
STEP 03
Update your graphics driver
Install the latest NVIDIA/AMD/Intel driver. Old drivers can trigger the same error while working with DirectX 9 components. Choose 'clean installation' during driver setup.
STEP 04
Restart and test
After restarting, launch the game that showed the error. d3dcompiler_43.dll is now present in System32 and the game runs.
STEP 05
If it persists, verify game files
Use Steam's Properties > Local Files > Verify integrity, or Epic's Manage > Verify. Alternatively, run the DirectX setup inside the game's _CommonRedist folder manually.
Tips
- If a game requests d3dx9_43, d3dx9_40 etc. one after another, the runtime setup fixes them all at once.
- If setup says 'source files not found', switch your network and retry — the web installer downloads from Microsoft servers.
- For 32-bit games the x86 DLL is looked up in the app folder; the runtime setup covers both cases.
02 — Frequently asked questions
Frequently asked questions
DirectX 12 is installed — why is d3dcompiler_43.dll requested?
Windows 10/11 includes only the DirectX 12 core and modern components. d3dcompiler_43.dll is the compiler module of pre-2010 DirectX 9 era games; that is why the legacy runtime package must be installed separately.
How is it different from d3dcompiler_47.dll?
Version 47 ships by default with modern games and Windows 10/11; version 43 is only needed by old titles. They serve different applications and do not substitute each other.
Is copying the DLL into the game folder enough?
It may work temporarily, but version mismatches cause further DLL errors. The official runtime installs all dependencies with correct versions — the permanent and safe solution.
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Links in this guide point to official platform pages. Steps may change with platform updates; check the page date.
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