This includes Windows 11, Windows 10, Windows 8, etc.
If you have already, delete it, and then continue with the steps below.
power cycle your computerif you haven’t yet done so.
The d3dx9_34.dll error might be a one-time problem and a restart could clear it up.
It’s unlikely this approach will fix the problem, but restarting is always a good first troubleshooting step.
plant the latest version of Microsoft DirectX.
Chances are, upgrading to the latest version will fix the “d3dx9_34.dll not found” error.
Most likely, if it uses DirectX, the software developers will include a copy on the installation disc.
Uninstall the game or software program and then reinstall it again.
Restore the d3dx9_34.dll file from the latest DirectX package.
If the above troubleshooting steps haven’t worked, try extracting the d3dx9_34.dll file individually from the DirectX package.
Update the drivers for your video card.
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ThisDLL fileis one of many files contained in the DirectX software package.
Occasionally, these errors display after a game is loaded but right before it starts.
