d3dx9_42.dll is missing - how to fix it

DirectX is a collection of various programming interfaces and is responsible for making computer games or 3D applications work. For this, it needs certain DLL files, such as the one named "d3dx9_42". If these files are missing, this can lead to problems.

d3dx9_42.dll is missing: How to get DirectX working again

DLL files are sometimes responsible for making a program work as desired. If one of these files is missing or damaged, the program will normally no longer run. This is also the case when DirectX's d3dx9_42.dll is missing. However, since DirectX is an application that is needed to run games or other 3D applications, for example, the missing file entails a correspondingly long rat tail.

1. In many cases, a simple restart of the computer is already sufficient to fix the problem.
2. If this is not the case, it may help to reinstall DirectX. Note that the latest versions 11.3 and 12 are included in Windows 10 and cannot be downloaded as a standalone package. Updates take place via Windows Update. Therefore, install all pending updates to ensure that DirectX is up to date.
3. The missing DLL file, however, comes from the DirectX 9 package. Dieses können Sie immer noch manuell herunterladen und installieren.
4. Auch veraltete Grafiktreiber können dafür sorgen, dass es zu Problemen mit DirectX kommt. Stellen Sie deshalb sicher, dass Sie auch dort die aktuellsten Treiber installiert haben. Die aktuelle Software für Ihre Grafikkarte finden Sie auf der Herstellerseite zum Download.