PC games throwing DLL errors

Typical symptoms

• "The code execution cannot proceed because d3dx9_43.dll was not found"
• "The code execution cannot proceed because xinput1_3.dll was not found"
• "The application was unable to start correctly (0xc000007b)"
• Steam games crash on launch; Epic games show a black screen

Official safe fix steps

1. Install the Microsoft DirectX End-User Runtime

   Windows 10/11 ship with DX12 and modern DX11, but many older games rely on legacy components like d3dx9_*, xinput1_3, xaudio2_7. Download and run the DirectX End-User Runtime Web Installer from microsoft.com — it will automatically install everything missing.

2. Install every VC++ Redistributable version

   Games from different eras depend on different VC++ versions. Install VC++ 2015-2022 (the merged latest) for both x86 and x64, plus VC++ 2010 / 2012 / 2013 for older games. All download links live on learn.microsoft.com.

3. Use the platform's "Verify game files integrity" feature

   Steam: Library → right-click game → Properties → Installed Files → Verify integrity. Epic: Library → game ⋯ menu → Verify. GOG Galaxy: Menu → Verify / Repair. This re-downloads and replaces any missing or corrupted DLLs shipped with the game.

4. Never drop a single DLL from a download site into the game folder

   This is the #1 trap for gamers. Random DLLs from the web frequently contain crypto-miners or credential stealers. Even if the game starts, version mismatches will cause stranger crashes later.

DLLs commonly seen in this scenario