The problem might be with your game installation itself, not Windows. A core file for RAN Online could be missing or corrupted. If you installed the game from a client rather than a platform like Steam, your best option is to reinstall the game. A clean reinstall will replace any missing or damaged files.
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Avoid downloading d3d9.dll from third-party "DLL fixer" websites. These files can be outdated or contain malware. Instead, always use official Microsoft installers to restore missing or corrupted DirectX files. D3D9 Application Error - Microsoft Q&A
You might encounter this issue in a few different ways, such as: how to fix d3d9 application error ran online
If modern Windows completely refuses to translate the game's old D3D9 calls, you can use a wrapper to convert DirectX 9 commands into DirectX 11 or 12 commands, which modern graphics cards handle flawlessly. Using dgVoodoo2:
Search for and download the standalone installer or the DirectX End-User Runtime Web Installer .
, which modern versions of Windows (10 and 11) often lack by default. 🛠️ Step 1: Install DirectX End-User Runtimes The problem might be with your game installation
An outdated or corrupt graphics driver is a major cause of DirectX errors.
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Save the file and try launching the game. If it opens successfully, you can gradually adjust the resolution inside the game settings menu. Step 4: Update or Roll Back Graphics Drivers A clean reinstall will replace any missing or damaged files
Most "D3D9" errors occur because the game cannot find specific Direct3D 9 files. Even if you have DirectX 12, you still need the legacy files. Download the DirectX End-User Runtime Web Installer from the official Microsoft site Run the installer and the "Install Bing Bar" option. Complete the installation and restart your computer Microsoft Learn ⚙️ Step 2: Configure Launcher & Compatibility
If the basic steps didn't work, these are the most reliable methods for fixing the root cause of the error.
, or motherboard monitoring tools can "break" DX9 hooks, causing crashes. Try closing these before launching the game. Official Game Patches