Software & Apps Windows How to Fix D3dx9_30.dll Not Found or Missing Errors By Tim Fisher General Manager, VP, Lifewire.com Tim Fisher has 30+ years' professional technology support experience. He writes troubleshooting content and is the General Manager of Lifewire. our editorial process Facebook Twitter LinkedIn Tim Fisher Updated November 15, 2019 D3dx9_30.dll Error. Windows The Ultimate Laptop Buying Guide Tweet Share Email Unlike many other DLL errors which can have complicated causes and fixes, d3dx9_30.dll issues are caused in one way or another by a single issue: there's usually something wrong with Microsoft DirectX. The d3dx9_30.dll file is one of many files contained in the DirectX software collection. Since DirectX is utilized by most Windows based games and advanced graphics programs, d3dx9_30.dll errors usually show up only when using these kinds of applications. There are quite a few different ways that a d3dx9_30 DLL error might show up on your computer. Listed here are some of the more common d3dx9_30.dll error messages, but yours might be different: D3DX9_30.DLL Not FoundFile d3dx9_30.dll not foundThe dynamic link library d3dx9_30.dll could not be found in the specified path [PATH]The file d3dx9_30.dll is missingD3DX9_30.DLL is missing. Replace D3DX9_30.DLL and try againD3dx9_30.dll not found. Reinstalling might help fix thisMissing component d3dx9_30.dllThis application has failed to start because d3dx9_30.dll could not be found Cause of D3dx9_30.dll Errors The d3dx9_30 DLL error message could apply to any program that utilizes Microsoft DirectX, but it's most commonly seen with video games. The error typically appears when the software program is started. Occasionally, d3dx9_30.dll errors will display after a game is loaded but right before gameplay begins. Some common games that have been known to generate d3dx9_30.dll errors include Medieval, Resident Evil, EverQuest, Splinter Cell Double Agent, ArmA: Armed Assault, World Series of Poker, Company of Heroes, and more. In non-game applications, a d3dx9_30 DLL error might appear before certain advanced graphics features of the program are used. Any of Microsoft's operating systems since Windows 98 may be affected by d3dx9_30.dll and other DirectX issues. This includes Windows 10, Windows 8, Windows 7, Windows Vista, Windows XP, and Windows 2000. How to Fix D3dx9_30.dll Errors Do not, under any circumstances, download the d3dx9_30.dll DLL file individually from any "DLL download site". There are a number of different reasons that downloading DLLs from these sites is never a good idea. If you've already downloaded d3dx9_30.dll from one of those DLL download sites, remove it from wherever you put it and continue with the following steps. Restart your computer if you haven't yet done so. The d3dx9_30 DLL error might be a fluke or one-time issue, and a simple restart could clear it up completely. It's unlikely this will fix the problem, but restarting is always a good first troubleshooting step. Install the latest version of Microsoft DirectX. Chances are, upgrading to the latest version of DirectX will fix the d3dx9_30.dll not found error. Microsoft often releases updates to DirectX without updating the version number or letter, so be sure to install the latest release even if your version is technically the same. The same DirectX installation program works with all versions of Windows including Windows 10, 8, 7, Vista, XP, and more. It will replace any missing DirectX 11, DirectX 10, or DirectX 9 file. Assuming the latest DirectX version from Microsoft doesn't fix the d3dx9_30 DLL error you're receiving, look for a DirectX installation program on your game or application CD or DVD. Usually, if a game or another program utilizes DirectX, the software developers will include a copy of DirectX on the installation disc. Sometimes, though not often, the DirectX version included on the disc is a better fit for the program than the latest version available online. Uninstall the game or software program and then reinstall it again. Something may have happened to the files in the program that work with d3dx9_30.dll and a reinstall could do the trick. Restore the d3dx9_30.dll file from the latest DirectX package. If the above troubleshooting steps haven't worked to solve your d3dx9_30.dll error, try extracting the d3dx9_30 DLL file individually from the DirectX package. If the DLL error in the game or other program explains where the d3dx9_30.dll file needs to be, you can manually copy it from your extraction and put it right where it should go, which should fix the error. Update the drivers for your video card. While it's not the most common solution, in some situations, updating the drivers for the video card in your computer could correct this DirectX issue. Need More Help? If you don't want to fix this problem yourself, see How Do I Get My Computer Fixed? for a full list of your support options, plus help with everything along the way like figuring out repair costs, getting your files off, choosing a repair service, and a whole lot more.