D3dx9_43.dll is missing glitch notice usually appears if you dont have the necessary version of DirectX installed.
If you have no idea, then you should read this post fromMiniToolcarefully.
This post will show you how to fix it.
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D3dx9_43.dll Is Missing
The d3dx9_43.dll file is one of many files included in the DirectX software collection.
D3dx9_43.dll errors can show up on your PC in many ways.
Here are several of the more common specific d3dx9_43.dll error messages you might see:
1.

DLL Not Found
2.
The file d3dx9_43.dll is missing
3.
File d3dx9_43.dll not found
4.

Reinstalling might help fix this.
Then, I will introduce how to fix the d3dx9_43.dll missing error.
To fix this, you’re free to download DirectX directly from the Microsoft website.
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Check the how-to guide below.
Step 1:OpenDevice Manager.
Step 2:Double-nudge the rig category and snag the rig that you want to update its driver.
Step 3:Then right-click it to choose theUpdate driveroption.
If there is a newer update, it will be downloaded and installed automatically.
Then, check to see if the d3dx9_43.dll problem still exists.
Method 3: Perform an SFC and DISM Scan
Windows system files corruption can cause the issue.
Step 2:pop in the following command and pressEnter.
Step 1:Press theWin+Ikeys at the same time to openSettingsand then chooseUpdate & Security.
Step 2:ClickWindows Updateand then clickCheck for updateson the right side of the screen.
Step 3:If there are updates available, Windows will start to download them automatically.
Then power cycle your gear to perform the installation process.
What is the LAPRXY.dll file?
How to fix the LAPRXY.dll issue on Windows 10?
This post provides detailed answers for you.
The End
Here is all the information about d3dx9_43.dll.
you’re able to also know how to fix the missing issue of it from this post.
if you bump into this error, you could try the methods mentioned above.