The program cannot be launched d3dx9 31 Fixing an error with the missing d3dx9_31.dll library. Which games most often trigger the d3dx9_30.dll or d3dx9_31.dll error?

Useful tips

Sometimes d3dx9_31.dll and other DLL system errors can be related to problems in the Windows registry. Several programs can use the d3dx9_31.dll file, but when those programs are uninstalled or modified, sometimes "orphaned" (invalid) DLL registry entries are left behind.

Basically, this means that while the actual path of the file may have changed, its incorrect former location is still recorded in the Windows Registry. When Windows tries to look up these incorrect file references (file locations on your computer), d3dx9_31.dll errors can occur. Additionally, a malware infection may have corrupted registry entries associated with The Sims Castaway Stories. Thus, these corrupted DLL registry entries need to be fixed to fix the problem at the root.

Manually editing the Windows registry to remove invalid d3dx9_31.dll keys is not recommended unless you are a PC service professional. Mistakes made when editing the registry can render your PC inoperable and cause irreparable damage to your operating system. In fact, even one comma placed in the wrong place can prevent your computer from booting!

Because of this risk, we highly recommend using a trusted registry cleaner such as WinThruster (Developed by Microsoft Gold Certified Partner) to scan and repair any d3dx9_31.dll-related registry problems. Using a registry cleaner, you can automate the process of finding corrupted registry entries, missing file references (such as the one causing the d3dx9_31.dll error), and broken links within the registry. Before each scan, a backup copy is automatically created, allowing you to undo any changes with one click and protecting you from possible damage to your computer. The best part is that eliminating registry errors can dramatically improve system speed and performance.

Warning: Unless you are an experienced PC user, we DO NOT recommend manually editing the Windows Registry. Using Registry Editor incorrectly may cause serious problems that may require you to reinstall Windows. We do not guarantee that problems resulting from incorrect use of Registry Editor can be corrected. You use Registry Editor at your own risk.

Before you manually repair the Windows registry, you need to create a backup by exporting a portion of the registry associated with d3dx9_31.dll (eg. The Sims Castaway Stories):

Click on the button Begin.
Enter " command" V search bar... DON'T CLICK YET ENTER!
While holding down the keys CTRL-Shift on your keyboard, press ENTER.
A dialog box for access will be displayed.
Click Yes.
The black box opens with a blinking cursor.
Enter " regedit" and press ENTER.
In the Registry Editor, select the d3dx9_31.dll-related key (eg. The Sims Castaway Stories) you want to back up.
On the menu File select Export.
On the list Save to Select the folder where you want to save your backup copy of The Sims Castaway Stories key.
In field File name Enter a name for the backup file, such as "The Sims Castaway Stories backup".
Make sure the field Export range value selected Selected branch.
Click Save.
The file will be saved with extension .reg.
You now have a backup of your d3dx9_31.dll-related registry entry.

The following steps for manually editing the registry will not be described in this article, as they are likely to damage your system. If you would like more information about editing the registry manually, please check out the links below.

There are very few people who have not encountered an error related to the absence of the d3dx9 31 dll library on their computer. A very common mistake, but most often it is solved incorrectly: download d3dx9 31 dll to the computer separately, which does not solve the error, but only aggravates it. But we will go a different way! This method will solve the problem 100%, but first, let's talk about this error in more detail.

The game has already been downloaded and installed on the computer, but the only thing we see when starting is a system error message: “The program cannot be started because d3dx9_31.dll is missing...”. And the question immediately arises: what to do? Where to download d3dx9 31 dll for Windows 7-8-10? And where should I throw it after downloading? And why doesn't this method work? But everything is very simple. In just a couple of minutes the game will work and you will forget about this error.

But first, let’s figure out where this error comes from, and then quickly solve it.

How to solve the problem with d3dx9 31 dll and what is this error

To begin with, I will say that downloading the d3dx9 31 dll file is the worst idea in the world. No, you can download it, but the probability of solving the problem will be 1%, and in 99% of cases you will damage the system or infect your computer with a selected collection of viruses.

The problem can be solved in another way, namely, you need to download DirectX - this application includes all the dlls that are needed for the games to work. And know that it needs to be updated from time to time! To do this, you just need to download the installer from our website using the link below:

Installing DirectX is quite easy! Download and launch the application. After which, you will see the program welcome window. Here you just need to accept the license agreement and click next:

There's no need to rush! There is an important point: you need to uncheck the box: “Install the Bing panel.” We don't need it, do we? This is how all sorts of garbage accumulates on a computer; with one program you can install a complete package of “useful” programs. So be careful friends!

After this, the application will be installed:

And the installation message we've been waiting for! We did it! Installed the d3dx9 31 dll program without registration and SMS:

Here's another video I recorded for you:

So, I decided to write about the second solution, which most likely will not work, but suddenly someone really needs to download d3dx9 31 dll separately, and not leave it without instructions.

You will need to copy this ddl to the system folder, most often this is C:\Windows\System32\, as well as C:\Windows\SysWOW64\ for a 64-bit system. I wrote about how to find out about your system here:

Each of you has probably encountered the d3dx9_31.dll error on your computer at least once. In an attempt to solve the problem, a person searches for the missing file on the network and often downloads a virus to the PC or laptop. In this article we will tell you how to safely download d3dx9_31.dll and correctly add it to the system.

The file belongs to the Microsoft DirectX library, which is needed for rendering 3D graphics in games, for example, Sims 3, GTA 4, etc. If one or more components are missing, naturally, the game will not start, and the user will see the following message: The program cannot start because d3dx9_31.dll is missing . In most cases, the error appears due to DirectX being completely missing, or sometimes one of its components is damaged. Below we will look at what it is, what the problem is, how to fix it and launch the game we need.

Solving the problem

There are two ways to fix the situation: install DirectX or add its missing component. The first method is preferred, but for completeness, we will describe both of them.

Attention! Use the file option only if the game does not start after reinstalling DirectX.

Installing DirectX

Let's fix the error when starting the game by installing Microsoft DirectX. This library contains all the dlls necessary for any game to work, including ours.

To get started, download the official software installer and run it. Here we will be asked to accept the license of use - to do this, check the radio button as we did in the screenshot. We strongly do not recommend searching for DirectX on the Internet. There are a lot of fakes that will install a bunch of unnecessary software or, even worse, a virus on your computer.

Here we need to remove the small, invisible checkbox that tends to download and install unnecessary software on our computer. When this is done, click on “Next”.

As a result, the library, and along with it all the necessary components, will be downloaded and installed on the PC. All that remains is to try to launch the game. Sometimes you also need to restart your computer for the changes to be applied.

Download and install the d3dx9_31.dll file separately

This method does not guarantee the successful launch of the game. There is only a small chance that after adding the file to the system directory and to the game folder, the latter will start working. Still, we have no right not to mention an option that, at least theoretically, can lead to success.

First of all, download it to your computer or laptop. The archive has a .zip extension, so you don’t need an archiver to open it - any Windows operating system can handle it. We extract the file depending on the bit depth of the system and put it in a convenient place. Next, copy the required component to the system directory of Windows XP, Windows 7, Windows 8 or Windows 10.

If you have an x32-bit system:

C:\Windows\system32

x64-bit system:

C:\Windows\sysWOW64

To determine the bitness of your system, use the keyboard shortcut Win + PauseBreak. In the window that opens, you will see the architecture of the operating system (indicated in the screenshot with a red frame).

Now copy the downloaded file to the game folder. Place it in the directory that contains the .exe files that run it. After this, you need to register the components. We will do this through the command line. In Windows 10, you can open it through search. To do this, click on the magnifying glass icon and enter the word in the search bar cmd . We right-click on the result that appears and select the section indicated in the picture with the number “3”.

After applying the changes, be sure to restart your PC and only then try to launch the game.

Let's sum it up

In the article, we told you where to download d3dx9_31.dll for free and how to correctly install it on the system as a single file and a Microsoft DirectX library. If you have any difficulties or just want to ask us a question, write it in the comments - we will definitely help every user.

D3dx9_31.dll is a file that is part of the DirectX software package that is installed to load and operate gaming applications. Opening a game or application may be accompanied by an error that prevents the game from opening and notifies the user that D3dx9 31 dll is missing from the computer. The D3dx9 31 dll file is responsible for displaying three-dimensional graphics and helps launch the game in full screen mode; the absence of a component will not only prevent you from using the game application in windowed mode, but will also prevent it from starting. To fix the error, the user needs to install the required library component using one of the methods.

Before using the D3dx9 31 dll free download function for Windows, it is recommended to review the antivirus software storage; perhaps, when installing the game, the antivirus program blocked the component, considering it a threat to the system. If you find a file in storage or in the Recycle Bin where it may have been placed, you should restore it.

If the Recycle Bin or Storage does not contain the required component, users can update the DirectX File Library, which will automatically install all the components required to run and function gaming applications such as: The Sims 3, Need For Speed, Grand Theft Auto 4, Skyrim, World of Tanks and many others. Installing a file library will prevent errors from appearing notifying you that other components that are responsible for running applications and games are missing.

In order to fix the error and normalize the operation of multimedia applications, you can resort to installing a separate component that was not found during loading. To do this, download the D3dx9 31 dll component and manually install it on the system. For proper installation, you need to select a folder where to place the file. The storage and installation location is determined by the bitness of the system, which can be viewed in the “Computer” folder by opening properties.

How to fix the error?

Method 1.

The file D3dx9_31.dll belongs to the DirectX 9 library, so it’s enough to install it if you don’t have it, or reinstall it if yours is damaged.

Method 2.

This is an additional option for correcting this error, in which files are added manually and registered in the system.

File registration sequence:

Determine what bit depth your Windows is;
For 32 bits, download only the 32bit file;
For 64 bits, download both 32 and 64 bits;
Place the 32-bit file in the folder: C:\Windows\System32;
Place the 64-bit file in the folder: C:\Windows\SysWOW64;
To register, press the combination Win + R;
We write the command for 32: regsvr32 name.dll(replace the name with the name of file 32);
We write the command for 64: regsvr32 name.dll(replace the name with the file name 64);
Click "OK and restart the PC;

Does the game show the error d3dx9_30.dll or d3dx9_3!.dll? Download d3dx9_30.dll and d3dx9_31.dll files for WoT, WoWS, CS: GO and other games for Windows XP, 7, 8, 10 (x64 / x86) systems.

Missing files D3dx9_30.dll or D3dx9_31.dll - what is the error

The d3dx9_30.dll or d3dx9_31.dll files begin with the abbreviation D3dx, which means that they are part of the DirectX component libraries and are part of the Direct3D API set of functions. (See the file properties in the screenshot).

Based on this, we will fight the error.

What messages does it give?

The error displays a window with the text:

In Russian:
The program cannot be launched because d3dx9_30.dll is missing from the computer. Try reinstalling the program.
And
The program cannot be launched because d3dx9_31.dll is missing from the computer. Try reinstalling the program.

Or in English:
The program can’t start because d3dx9_30.dll is missing from your computer. Try reinstalling the program to fix this problem.
And
The program can’t start because d3dx9_31.dll is missing from your computer. Try reinstalling the program to fix this problem.

Which games most often trigger the d3dx9_30.dll or d3dx9_31.dll error:

PES 2011, PES 2012, PES 2013 and newer versions of Pro Evolution Soccer,
FlatOut, FlatOut 2,
Ragnarok Online,
The Sims 3, The Sims 4 and other versions of The Sims,
GTA 4, GTA 5 and other versions of Grand Theft Auto,
World of Tanks (WoT),
World of Warships (WoWS),
a whole range of other video games.

System error d3dx9_30.dll file is missing. Solution

System error d3dx9_31.dll file is missing. Solution

1. Reinstall DirectX
Before downloading .dll files, try to reinstall DirectX, as they are part of this application (see error description above).

2. Copy and replace the corresponding file
If reinstalling DirectX did not give anything, there is nothing left to do but copy and replace the file that caused the error.

File d3dx9_30.dll download for free, copy to System32 or SysWOW64

File d3dx9_31.dll download for free, copy to System32 or SysWOW64

Algorithm of actions (common for both cases)

Download and unpack the archive.
Go to the folder with system files: Computer → Local disk (C:) → Windows → System32, if the system is 32-bit.
Go to the folder with system files: Computer → Local disk (C:) → Windows → SysWOW64, if the system is 64-bit.
Copy and replace the files from the downloaded folder to the system folder.
Register the dll on Windows. Let's move on: Start → Search→ Run(or press hot keys Windows + R). In the window that opens "Run" we write: regsvr32.exe d3dx9_30.dll or r egsvr32.exe d3dx9_31.dll
Click Ok.
Restart your computer.
Enjoy life.