The d3d9.dll file belongs to the DirectX 9 software and its main function is to add DirectX functionality to Windows games and other multimedia applications.
Many of the d3d9.dll errors occur when you have older version of DirectX on your PC. For instance, you may receive d3d9.dll errors, similar to the ones listed below in case you try to run a game that is specifically written for DirectX 9 on a PC that uses DirectX 8 or some other older version.
- “Cannot initialize dinput9.dll”
- “Fatal Exception error in dplayx.dll”
- “dplay.dll has performed an illegal operation”
- “Access violation error in DirectX file D3D8.DLL”
To fix the error, you need to download and install the latest DirectX version on your system. If you are not sure of which DirectX version is running on your system, perform the following tasks to find out:
- Open Start menu and select the Run command.
- In the Open box, type dxdiag and press Enter to open the DirectX Diagnostic Tool window.
- Here, you can find the DirectX version that is installed on your PC in the bottom part.
If you see that you are using an older version of DirectX, download the latest DirectX version supported by your Windows operating system and then install it on your computer to resolve the errors.
You may also search for DirectX updates on the Windows update website. If you find an update, download and install it on your computer.
Apart from the above errors, other common d3d9.dll errors include missing or not found DLL errors. Examples of the error messages that you may receive are displayed below:
- “D3d9.dll File not found”
- “The application failed to start because the file d3d9.dll was not found. Reinstalling the application may fix the error.”
- “The file d3d9.dll is missing”
- “Unable to load the application. An important component: d3d9.dll is missing. Install the application again.”
These DLL errors occur due to situations that lead to either removal or corruption of the d3d9.dll file. Follow the steps mentioned below to fix these problems:
- If the file d3d9.dll is missing from your computer, either download the file from the Internet or copy it from a computer with same configuration as your PC. However, before you do this, first check the contents of your Recycle Bin to ensure that the file was not deleted by mistake. If you find the missing file in the Recycle Bin, restore it to correct the error.
- If the DLL error has started appearing after you have uninstalled any game or software program, chances are that reinstalling the removed program will fix the error.
- If the error occurs only when you try to run a specific program, updating the program may fix the problem.
- Several DLL errors also occur due to malware infections. Use robust and reliable antivirus and antispyware tools, such as STOPzilla Antivirus and Spyware Cease to scan your PC for malware infections and then fix them.
- Finally, use a reliable registry tool, such as RegServe to scan your registry for incorrect DLL entries. If any erroneous entries are detected, fix them using the tool to repair DLL errors.