How do I fix "d3dx9_42.dll is missing" error?

Install the DirectX End-User Runtime from Microsoft. This package includes d3dx9_42.dll and other DirectX components needed by games. Download from: https://www.microsoft.com/en-us/download/details.aspx?id=35

Is it safe to download d3dx9_42.dll?

Yes, when downloaded from official sources. We recommend installing the official DirectX End-User Runtime package instead of downloading individual DLL files. This ensures you get a digitally signed, verified file directly from Microsoft.

Where should I put d3dx9_42.dll?

For 64-bit applications, place in C:\Windows\System32. For 32-bit applications on 64-bit Windows, place in C:\Windows\SysWOW64. However, we strongly recommend using the official installer instead of manual placement.

DirectX Version 9.26.952.3235

Fix d3dx9_42.dll Missing Error

Scanned: 2025-11-30

MD5 Verified

1.9M+ downloads

⚡ Quick Fix: Install DirectX End-User Runtime

This is the recommended fix from Microsoft. It will restore d3dx9_42.dll and all related runtime files automatically.

Download Official Package From Microsoft.com

Common Error Messages

✗ d3dx9_42.dll is missing

✗ D3DX9_42.dll was not found

What is d3dx9_42.dll?

D3DX9_42.dll is part of the DirectX 9 utilities library. Required by games released around 2008-2010 including Call of Duty: Modern Warfare 2 and GTA IV.

How to Fix "d3dx9_42.dll is missing" Error

1 Method 1: Install DirectX End-User Runtime (Recommended)

This package includes all legacy DirectX files (d3dx9, xinput, xaudio, etc.)

Download DirectX End-User Runtime Web Installer
Run dxwebsetup.exe
Follow the installation wizard
Restart your computer

2 Method 2: Verify Game Files (For Steam Games)

If this error occurs in a Steam game:

Open Steam Library
Right-click the game → Properties
Go to Local Files tab
Click "Verify integrity of game files"

Manual Download (Last Resort)

⚠️ Important Warning

Downloading individual DLL files is not recommended. We strongly advise using the official runtime package above. Only use manual download if the official method fails.

If you must manually place the file:
• 64-bit apps: C:\Windows\System32
• 32-bit apps on 64-bit Windows: C:\Windows\SysWOW64