D3DCompiler_43.dll when launching a program, it means a required DirectX component is missing from your system. This is fixed by installing or reinstalling DirectX.
Fix: Reinstall DirectX
1
Download the DirectX End-User Runtime installer
Download the official Microsoft DirectX installer:Download DirectX Web Setup
2
Run the installer
Run
dxwebsetup.exe and follow the prompts to install the required DirectX components. An internet connection is required during installation.3
Restart and retry
After installation completes, restart your PC and try launching the loader again.
This error is unrelated to anti-virus or driver issues. It simply means the D3DCompiler_43.dll file is not present on your system, which is resolved by the DirectX installer above.