So, when you tried to launch the application on the screen, you received a message about the missing d3dx9_43.dll file and the impossibility of launching. It looks like this:
“The program cannot start because d3dx9_43.dll is missing on the computer. Try reinstalling the program"
Do not try to immediately find this file on the Internet and download it - in the end you may end up installing many viruses, after which only a total cleaning of the system will help solve the problem.
Reasons why the d3dx9_43.dll file is missing
Some computer games and programs will not launch without one of the DirectX 9 components - d3dx9_43.dll. It may be missing for various reasons - malware damaged it earlier installed file, the antivirus “counted” this file unnecessary and sent to quarantine, or simply the file was not installed initially.
How to solve a problem?
Download DirectX from the official website and install it. The installer will automatically check for missing program components and add them to the desired folder. After installation is complete, restart your computer. The missing component issue should no longer occur.
If you nevertheless decide to install exclusively the d3dx9_43.dll component, you do this at your own peril and risk, since it is not presented separately on the official website, and various “dubious” sources will probably send you several viruses as a gift. How to install the file separately? Follow the simple instructions:
- download the file to your computer;
- place it in the following folder: C:\Windows\System32 or C:\Windows\SysWOW64 and C:\Windows\System32 (depending on the type of system installed on your PC);
- call Command line and enter "regsvr32 filename.dll".
Thus, there are two ways to solve the problem with the d3dx9_43.dll file: a comprehensive update or installing the missing component. We remind you to choose official sites to avoid problems with malware.
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The article will discuss what d3dx9_43.dll is, what this file is needed for and how to install it. As a result of reading the article, you will find all the answers to the questions posed and will be able to independently eliminate errors caused by the absence of this library in the system.
Definition
Initially, before moving directly to the story of how to fix the error, it is worth explaining what d3dx9_43.dll is, because you need to know what we are dealing with.
So, d3dx9_43.dll is a library that is one of the components of the DirectX 9 package. A window with the message “Error, d3dx9_43.dll is missing” appears most often when starting games, but sometimes it can also occur in programs. The fact is that this component works with 3D models that are directly found in games or in modeling programs.
It is also interesting that, for example, DirectX 10 or even 12 may be installed on the computer, but the error will still appear. This is due to the fact that different versions of packages contain different libraries that may not be compatible with certain applications.
Now that we know what d3dx9_43.dll is, we can move directly to how to fix the error caused by the absence of this library.
Method one: by installing the DirectX 9 package
Understanding what d3dx9_43.dll is, you learned that it is part of the DirectX 9 package. From this we can already conclude that to add this library to the system, you just need to install the appropriate package. By the way, this method is the most correct and safe, so we will analyze it first.
So, first you need to download DirectX 9 to your computer. This should only be done from the official website microsoft.com, since there may be software, infected with a virus. To download the package correctly, you need to do the following:
- At any search engine enter the request "download directx 9".
- Find and follow the link from domain name microsoft.com.
- On the page that opens, select the system language from the drop-down list.
- Click the "Download" button.
After this, the DirectX distribution will begin downloading, wait until it finishes, and then do the following:
- Run the downloaded file.
- In the window that opens, set the switch to I accept the agreement.
- Click Next.
- Wait until the package installation finishes.
- Click the Finish button.
After completing all the steps, the required library will be installed on the system, and you can easily launch all the programs and games that were not working before.
Method two: using the DLL-File.com client
The above method, as already mentioned, is the most correct, however, as you can see, it requires spending quite a lot of time to complete it. The method that will be presented now will take a minimum of it from you, and just like the previous one, it is completely safe.
To install the required library into the system, we will use a special program from the site DLL-File.com, with its help you can quickly find and install any dll file. But since our article is about d3dx9_43.dll, we will install it.
So, for proper installation you need to do the following:
- Open the program.
- Enter the name of the library in the search bar on the main screen.
- Click the "Search for DLL file" button.
- Click on the name of the found library.
- Click the "Install" button.
After you do this, the program will automatically download the dll file from the Internet and install it on your computer.
Method three: manual installation
If you like to do everything manually, then you can install this library the same way. To do this, you need to download the file and place it in the desired directory on your computer. Right now we’ll figure out where to throw d3dx9_43.dll.
So, first download the file to your computer. After that, be sure to check it for viruses, as attackers often place them there. After this, you need to place the downloaded file in a directory. And here a difficulty arises, for example, on Windows 8 d3dx9_43.dll needs to be placed in a folder located along the path “C:\Windows\System32”, the same in Windows 7 and 10. But in Windows 95/98/Me the path the other is: "C:\Windows\System", while in Windows NT/2000 it is: C:\WINNT\System32. It is also worth noting that on 64-bit systems sometimes you need to place the library in the path "C:\Windows\SysWOW64".
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Many users and most often gamers have encountered the d3dx9 43 dll format error. The error window says that this application or game cannot be launched if the d3dx9 43 dll is missing. Let's try to understand in more detail the nature of this error and solve the most in a simple way.
What is d3dx9_43
The location of the libraries we are interested in:
- Windows\System32\ - for 32-bit systems
- Windows \SysWOW64\ - for 64-bit systems
For example clean Windows 10, we can notice that there are no files in the d3dx??_??.dll format.
In fact, the library we need is included in the DirectX 9 package, which is not installed by default in operating system. Download the d3dx9 43 dll file for Windows 7 or 10, so you will need to do it yourself.
Let's go to the DirectX download page and download the online installer. Or download the offline installer - link. 
After you run the DirectX installation, you will be prompted to download the update package and install it when the download is complete. 
Upon completion of all installations, we can find previously necessary files in the right place. Try running the application, the d3dx9 43 dll error should disappear. 
What to do if d3dx9 43 dll error has changed?
This situation can happen if you tried to download the required file from the Internet and copy it to the System32 folder.
Why you shouldn't download DLLs from third-party sites:
- The downloaded file may contain malicious code or a virus, and in addition to the component itself, downloads may also contain adware or unwanted software
- This may not help because it won't contain necessary information(another version) and will slow down the resolution of the issue
If this situation occurs, then delete this file and reinstall DirectX.
If you are sure that you have found the correct and necessary library, then follow the following instructions:
- Move the desired component to the folder (System32 or SysWOW64)
- Open the Run window (Win+R) and enter the following command regsvr32 (library name) (For example: regsvr32 d3dx9_43.dll)
- Restart your computer
In most cases, this method allows you to resolve the issue of an error occurring when starting a program.
Have a great day!
When launched, games and programs access Microsoft libraries. If the necessary drivers were not installed when installing the application, an error message appears with the text “d3dx9_43.dll is missing on the computer.” The problem is fixed quite quickly, but the main thing is to fix it correctly, otherwise you can harm the system.
What is this file?
The d3dx9_43.dll file is a DirectX 9 component. If programs need this particular version of the library to work correctly, they will not run without this part. 
Even if DirectX 10 and 11 are installed on your computer, they will not be enough if the program requires components from the ninth version.
The error often occurs when launching old games. But it can also appear when trying to play World of Tanks and other modern projects that are popular.
To fix the error, just place the d3dx9_43.dll component in the C:\Windows\System32 directory. It is important to download the official version, otherwise you can infect your system with malware.
Where to download d3dx9_43.dll?
When an error occurs, many users are looking for where to download the d3dx9_43.dll component for free. However, this is the wrong approach to solving the problem.
- Often an application is missing multiple library files when the error message only lists one component.
- Instead of a working DirectX component, you can download malware to your computer.
During the installation of a game or program, the installation wizard prompts you to add DirectX to the system. Do not ignore this suggestion, then problems with missing components will not arise. But if the game is already installed, but does not start due to an incomplete set of libraries, then you can go another way:
