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 it in the simplest 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

Using clean Windows 10 as an example, 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 on the operating system by default. 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 the previously required files in their proper 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 will not contain the 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:

1. Move the desired component to the folder (System32 or SysWOW64)
2. Open the Run window (Win+R) and enter the following command regsvr32 (library name) (For example: regsvr32 d3dx9_43.dll)
3. 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!

The error about the missing d3dx9_43.dll file in the Windows operating system most often occurs when you try to launch a game or other application that uses the DirectX graphics subsystem. We understand the causes of the problem, as well as ways to fix it.

d3dx9_43.dll is missing on the computer: what does the error mean?

An error like “d3dx9_43.dll is missing from the computer, the program cannot be launched” is a consequence of the lack of installed DirectX version 9 library (this version of the API was released with Windows XP and is mainly used in older games and applications).

This library is an implementation of the Microsoft API for low-level operation of programs with computer hardware resources. Simply put, with its help, a program or game will be able to “correctly” access the sound card, video accelerator and input/output devices (including the gamepad).

Can this error occur on Windows 7, 8, 10? Yes, even if DirectX above version 9 is already installed on your computer. To support older applications and games, you will need to install all versions of the API.

Causes of the problem

Most often, the error indicates that the operating system was recently installed and DirectX has not yet been installed.

The lack of a library included with Windows is due to the fact that some patents of manufacturers of graphics processors, sound cards and HID devices may be violated. That is, this is a purely legal formality.

Also, a problem related to the d3dx9_43.dll library may occur in the following cases:

• damage to the hard drive (the appearance of “bad” sectors when the information recorded on them is erased);
• the DirectX library has been replaced (this happens if you try to install an outdated version of the API, for example, DirectX 8);
• damage to the OS by viruses (they often replace system libraries with third-party DLL files into which malicious code is embedded);
• problems with the registry - for some reason the DirectX library is not registered in it (although the d3dx9_43.dll file itself is present in the system);
• Outdated drivers are installed for the sound card, graphics accelerator, HID devices (DirectX support for devices is implemented through drivers).

How to fix the error

It is not always possible to determine the exact cause of the error, so you will have to try all possible methods to eliminate it. First of all, it is recommended to scan the system partition for viruses, then try to register the library using the command line. It’s also worth trying to clean the registry and update the drivers (in particular, the sound and graphics cards). And if DirectX has not been installed previously, you should download it from the official Microsoft website and install it.

Virus check

Even if the d3dx9_43.dll file is present on the system disk (it is located in the C:\Windows\System32 directory), it is quite possible that it was replaced by a damaged or virus-infected file. And, by the way, such virus programs quite often replace several libraries at once, disrupting the operation of the operating system. Therefore, you should start by checking your computer for viruses.

Windows 7 has a built-in Microsoft Security Essential antivirus program by default (Home Premium and higher editions). If it is not in the list of installed applications (in Windows 8, 8.1, 10 it is called Windows Defender and is already integrated into the system), then you will first need to download it from the official website (windows.microsoft.com/ru-RU/windows/products /security-essentials) and install. The utility is provided free of charge.

After installation you will need:

If for some reason the user does not want to install an antivirus from Microsoft, then you can use the free Dr.Web CureIT! utility. You can download it from the official website (free.drweb.ru/download+cureit+free/?lng=ru).

You can check your computer using the free Dr.Web CureIT!

The key feature of the CureIT utility is that there is no need to install it. At the same time, the program allows you to scan not only the system partition, but also all installed hard drives.

Registering a library via the command line

This action will help if for some reason the DirectX library was not registered in the registry (software error or OS malfunction).

Algorithm of actions:

Removing and restoring a library

If DirectX was previously installed on the PC, but during the automatic system update any problems arose (for example, there was no Internet or the update process was interrupted), then this may lead to the fact that a simple solution to this problem is to remove and repeat restoration of the library.

This is done as follows:

Cleaning the operating system registry

This library also causes problems in the registry. It is quite possible that the user tried to install DirectX several times and after each attempt, entries about the installer remained in the registry, but the API set itself was not in the system. The same will happen if any errors occurred during the DirectX update or the process was not completed.

The easiest method of cleaning the registry is to use. You can download it from the official website (ccleaner.com), you should choose the Free version.

After installing the program, perform the following steps:

Driver Update

Windows 10 automatically downloads all missing drivers, as well as all future updates for them. So, owners of this OS just need to enable system updates - then Windows will do everything itself.

But in older editions of Windows, installing and updating drivers must be done manually. A simpler option is to use special utilities to automatically search for and install missing drivers. One of these is DriverDoc. You can download it from the official website (driverdoc.com/index.html), but for its full operation you will need to purchase a license.

To update drivers using standard Windows tools you will need:

Even if this does not help solve the error problem, you must constantly install the latest versions of drivers for your PC. It is recommended to carry out this operation at least once every 2–3 months.

Downloading and installing DirectX

It should be downloaded exclusively from the official Microsoft website (microsoft.com/ru-ru/Download/confirmation.aspx?id=35).

The library's web installer will be saved to your computer. All you have to do is launch it and follow the instructions on the screen. By the way, if the user has DirectX version 10, 11 or 12 installed, the installer will independently check which libraries are missing and install them automatically. Once the installation is complete, be sure to restart your PC.

The latest versions of DirectX check on their own which libraries are present and which are missing

This recommendation applies to all versions of Windows, including the outdated (and no longer supported by the manufacturer) XP. For the web installer to work, you must have access to the Internet, since during the installation process it will download all the missing libraries (on average, it will require from 10 to 20 megabytes of traffic, the installer itself takes up less than 1 MB).

Video: troubleshooting d3dx9_43.dll error

What to do to prevent the error from occurring again

To prevent the error about the absence of the d3dx9_43.dll file from appearing on your computer, you should:

• enable automatic system updates (the Windows Update service must also be running);
• install DirectX using the web installer (it installs the latest version of the library);
• use the built-in Windows Defender antivirus or Microsoft Security Essential;
• regularly update drivers for all installed devices (in particular, sound card and graphics adapter);
• use only licensed software and Windows (so that automatic updating works, since pirated copies of Windows do not have this feature or only partially function).

There are many options for eliminating the error associated with the absence of the d3dx9_43.dll library. By following step-by-step instructions and recommendations, you can solve the problem yourself and prevent it from recurring in the future.

Any operating system is not immune to errors. Some of them are small, which have virtually no effect on performance, and some can cause significant harm to your time at the computer. In this article we will talk about the d3dx9_43.dll error that pops up when starting a game or program.

Definition

Before we begin with ways to fix the problem, it is worth initially telling what the d3dx9_43.dll error is and why it occurs in the system in the first place.

So, it’s worth clarifying right away that any file with the .dll extension is a library. In turn, the library allows the operating system to interact with any components of third-party software. Thus, the d3dx_43.dll library is a component of the well-known DirectX 9 package that interacts with 3D models. It follows from this that an error related to the absence of the provided library can only occur in cases where you are trying to run a program or game that contains these same 3D models.

Continuing to figure out what it is, it’s worth saying that fixing it is quite simple - you just need to register the library in the system. One option could be to install DirectX 9. Please note that the ninth version is needed, since it contains the necessary version of the library.

First way: using DLL Suite

Having figured out what the d3dx9_43.dll error is, you can move directly to ways to solve it. This is what we will do immediately.

When a d3dx9_43.dll error appears on the system, it can be fixed relatively simply. The first method will involve the use of a special program that was created specifically for such cases. The name of the software is DLL Suite, and if you are planning to troubleshoot a problem using it, be sure to download the program before proceeding with the instructions.

1. Launch the program.
2. Go to the "DLL Load" category.
3. Enter the name of the library in the search bar. In this case it is d3dx9_43.dll.
4. Click on the "Search" button.
5. In the results list, click on the desired library.
6. Select the version you need from the drop-down list.
7. Click the "Download" button.
8. In the window that appears, navigate to the required directory (usually the correct one is indicated by default).
9. Click OK.

After you have completed all the manipulations, the program will automatically download and install the library in the desired directory, and a green check mark will appear next to the library you selected, indicating that the task has been completed.

Second method: using DLL-Files.com

The previous method, as you can see, is quite simple, and its implementation should not cause problems for anyone, however, if the system still writes you the d3dx9_43.dll error, you can resort to the second, not much different, method.

This time we will use the DLL-File.com program, so first download it to your PC and install it. After that, to fix the error, you need to follow these steps:

1. Open the program.
2. In the first window, write the name of the library in the search bar. In this case it is the same d3dx9_43.dll.
3. Perform a search.
4. In the results, click on the found library.
5. Click the "Install" button.

In this case, even fewer points need to be completed. As a result, the required library will be automatically downloaded and installed in the directory. Then run the application that previously generated the error.

Third way: using DirectX 9

At the beginning of the article it was said that the d3dx9_43.dll library is a component of the DirectX 9 package, therefore, to add it to the system, you need to install this very package.

There is practically no difficulty in this, but there are many nuances. Firstly, you need to download the package exclusively from the official website, since there is a high risk of catching a virus from unreliable sources. Secondly, it is important to download the ninth version of the package, because, as mentioned earlier, only it contains the library we need.

1. In any search engine, write “download directx 9”.
2. In the results, go to microsoft.com.
3. On the page that appears, select your system language.
4. Click "Download".

After these manipulations, all you have to do is install the downloaded package on the system, after which the non-working applications will open without problems.

Now you know what the d3dx9_43.dll error is and how to fix it; there are at least three effective ways to do this.

D3dx9_43.dll is an essential component of DirectX 9, without which you will not be able to run some games and programs. Many users, after installing Mass Effect, World of Tanks, or other games and programs, see the error “D3dx9_43.dll is missing” or “D3dx9_43.dll not found.” Then a long search for this file on the network begins, which does not always end successfully. Someone is trying to download the D3dx9_43.dll file from a dubious site and then simply copy it to the C:\Windows\System32 folder. However, this option will get you nowhere.

“But why do I need DirectX 9?” you may object. Without a doubt, your computer probably has DirectX 11. And if you use Windows 10, then DirectX 12. This is not enough when the system lacks some libraries from previous versions of Direct X. And your favorite games simply won’t start.

In the instructions below, we will tell you in detail how to fix the error that has arisen. By the way, this problem appears in Windows 10, Windows 8 and Windows 7.

Step by step guide where to download D3dx9_43.dll

In order for the necessary .dll libraries to appear on your computer, you will need the Microsoft installer. It will add the necessary file to the system that corrects the error “Cannot start, d3dx9_43.dll is missing.”

1. To download the dll for Windows, as well as other additional DLLs, follow the link to the official website. Here you will be able to download the web installer.
2. Run dxwebsetup.exe. When prompted to install additional software, uncheck the boxes (it suggests installing the Microsoft Bing panel). We agree to the terms.
3. Wait until the installation completes. In automatic mode, the program downloads the missing files for the library.
4. After the message “Installation Complete” appears, try to launch the game or program that did not work before again. The message that D3dx9_43.dll is missing will no longer appear.

Second option:

1. Download the archive with the d3dx9_43.dll file from our website.
2. Copy the file from the archive to the folder C:\Windows\System32. If you have 64-bit Windows, then you need to put the file in the System32 and SysWOW64 folder.

Everything should work out.