Software & Apps Windows How to Fix D3dx10_43.dll Not Found or Missing Errors A troubleshooting guide for d3dx10_43.dll 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 March 25, 2020 Windows The Ultimate Laptop Buying Guide Tweet Share Email D3dx10_43.dll issues are caused in one way or another by an issue with Microsoft DirectX. The d3dx10_43 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, d3dx10_43.dll errors usually show up only when using these programs. Any of Microsoft's operating systems since Windows 98 may be affected by d3dx10_43.dll and other DirectX issues. This includes Windows 10, Windows 8, Windows 7, Windows Vista, Windows XP, and Windows 2000. D3dx10_43.dll Errors There are many ways d3dx10_43.dll errors can show up on your PC. Here are several of the more common specific d3dx10_43.dll error messages you might see: D3dx10_43.DLL Not FoundThe file d3dx10_43.dll is missingFile d3dx10_43.dll not foundD3dx10_43.dll not found. Reinstalling might help fix this. D3dx10_43.dll errors usually appear when a game or other software program is starting. However, DLL errors are not limited to that time only; they can occur at any point in time when the d3dx10_43 DLL file is needed, like when you try to perform a certain action in the program, when the program is trying to update, or when you're nearing the end of using the software and are about to close it down. The d3dx10_43.dll error message could apply to any program that utilizes Microsoft DirectX but it's most commonly associated with video games. Total War: ARENA, Arma 3, World of Tanks, and DC Universe Online (DCUO) are a few examples of video games that have been known to show a d3dx10_43.dll error message either after you select the Play button or when the game is first trying to open. How to Fix D3dx10_43.dll Errors Do not download the d3dx10_43.dll DLL file individually from any "DLL download site." There are several reasons that downloading DLLs from these sites are never a good idea. If you've already downloaded d3dx10_43.dll, remove it from wherever you put it and continue with these steps. Restart your computer if you haven't yet. The d3dx10_43.dll error might be a fluke and a simple restart could clear it up completely. In fact, restarting is a common method for fixing many computer problems. Install the latest version of Microsoft DirectX. Chances are, upgrading to the latest version of DirectX will fix the d3dx10_43.dll not found error. 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. 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. Assuming the latest DirectX version from Microsoft doesn't fix the d3dx10_43.dll error you're receiving, look for a DirectX installation program on your game or application DVD or CD. Usually, if a game or other 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 might have happened to the files in the program that work with d3dx10_43.dll and a reinstall could do the trick. Sometimes, a complete uninstall using a program uninstaller tool is the best way to get rid of every remnant of a program so that you'll have a better chance at a successful reinstall. Restore the d3dx10_43.dll file from the latest DirectX software package. If the above troubleshooting steps haven't worked to solve your d3dx10_43.dll error, try extracting the d3dx10_43.dll individually from the DirectX downloadable package. 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're not interested in fixing 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.