D3dx9_40.dll library uses a lot of games and programs. It is necessary for the correct display of 3D-graphics, respectively, if the component is missing in the system, the user when trying to run the application will receive an error message. Depending on the system, and many other factors, the text there can be different, but the essence is always the same - d3dx9_40.dll file is not in the system. The article will be given options to solve this problem.
Method 1: Download d3dx9_40.dll
If you want is as easy as possible to cope with the situation, you can manually install d3dx9_40.dll in. This is done quite simply, you need to download the library and move it to the system folder.
Follow these steps:
- Open the folder with the file library. Put it to the clipboard by pressing the RMB and selecting "Copy".
- Go to the system directory. If the Windows 32-bit, this is the folder C: \ Windows \ System32, if Windows 64 bit - it is the same, but additionally must place the file in the C: \ Windows \ SysWOW64.
- Insert the library file by clicking RMB on the empty space and select "Paste".
Once you perform the error should disappear. If not, most likely, the system will not register the DLL file automatically, this operation you need to perform on their own. Click through the "Start"> "Command Prompt"> "Run as administrator".
Write command regsvr32 d3dx9_40.dll and confirm by pressing Enter, the owners of the 64-bit operating system and need the second command: regsvr32 "C: \ Windows \ SysWOW64 \ d3dx9_40.dll".
On our site there is an article which describes the DLL and other detection methods.
Read more: Register the DLL file in Windows
Method 2: Installation DirectX
A dynamic link library d3dx9_40.dll - part of DirectX package, so that you can install the package presented, thereby placing the desired library system. But initially it is necessary to download. Immediately, we note that when using windose 10 should use a separate instruction. This must be due to the fact that DirektIks here is a system component and not a third party, as in the previous versions of the OS.
Read more: Reinstalling and adding the missing DIRECTX components in Windows 10
To download and install DirectX owners of older Windows do the following:
- Go to the product, after you select your system language, click "Download".
- In the window that appears, remove the checkboxes from the proposed additional software so that it does not boot along with DirectX. After that, click "refuse and continue."
Once the package installer will be on the computer, do the following:
- On behalf of the administrator, run the installer.
- Take the license conditions by setting the switch to the appropriate position, and click "Next".
- Uncheck the box with "Installing the Bing Panel" and click "Next" if you do not want the panel to be installed. Otherwise, leave a tick in place.
- Expect initialization.
- Wait for the download and install components.
- Click "Finish" to complete the installation.
Now the file d3dx9_40.dll is in the system, which means that the applications depend on it will work properly.
Method 3: Installing the latest system updates
This recommendation is most relevant for owners of Windows 10 copies, because, as we have already specified, this library set is built into the system. So libraries are added and updated with other updates that come to Microsoft computers. Nevertheless, set the latest updates if this has not yet been done, it is also important to users no longer supported by Windows 7. Such manipulation in any case is intended to eliminate possible conflicts and failures due to which the OS does not always function correctly and, for example, It fails to add DLL and make it be "prominent" for programs. With difficulties with installing updates, we recommend contacting our materials on the links below. Just click on the desired version of the OS to go to an article dedicated to this or that topic.Read more:
Installing updates on Windows 10 / Windows 7
Troubleshooting Windows 10 / Windows Upgrades 7
Method 4: Check Windows files for integrity
Typically, system components do not affect the operation of various DLLs, but sometimes it still happens. As a result of a variety of errors and conflicts of different levels of complexity, as well as problems with a hard disk (for example, due to the broken sectors, on which these most system files were located), Windows can start working unstable, and the user will face missing or damaged D3DX9_40.dll. Fix it can be launched an embedded application that works in the console mode. From the user you only need to write a command and wait for the scan results. Upon completion, it will be clear whether there are damaged files and whether their restoration helped to return the efficiency of DLL.
Read more: Using and restoring the integrity of system files in Windows
Do not forget that if there are problems with a specific library, it is quite possible that the virus started on the computer. Often, malicious software blocks the work of some important files for the system, and they could well be D3DX9_40.DLL.
Read more: Fighting computer viruses