Solution
D3DCompiler_43.dll is part of old DirectX SDK components. The correct approach is to install the runtime package, not replace system files manually.
Download DirectX Legacy Runtime.
Run the installer and wait for it to finish.
Restart the game.
If the error remains, check the game file integrity.
This package is selected for the typical runtime scenario of this error. If the problem is related to the graphics card or Feature Level, first check the driver and GPU capabilities.
Download packageFAQ
Better to install the runtime package first: it adds related components and reduces version error risk.
System DirectX and legacy components are different things. A game may require an old library not present in new Windows.
If the graphics card does not support the required Feature Level or the driver is damaged, the GPU and driver issue must be fixed.
DirectX versions
If the current page does not match your game or Windows, choose a neighboring runtime package. The cards link to individual version pages.
The DirectX package list scrolls horizontally. Use the buttons or arrow keys.
For modern games, Windows 10/11, and current graphics cards.
File:directx-12-runtime.exe
DownloadFor games from the Windows 7/8/10 era and projects that need a DX11 renderer.
File:directx-11-runtime.exe
DownloadFor old games and systems requiring DX10 compatibility.
File:directx-10-runtime.exe
DownloadFor classic games, D3DX9 components, and old game engines.
File:directx_Jun2010_redist.exe
DownloadFull package of legacy DirectX SDK components for old games.
File:directx_Jun2010_redist.exe
Download