stands for "Unable to retrieve D3D Device" . In simple English, the game is trying to talk to your graphics card (GPU), but your GPU is either too new, too busy, or speaking a different language. GTA IV was released in 2008, built on an aging version of DirectX 9. Modern graphics cards (NVIDIA RTX 40/50 series, AMD RX 7000 series) have moved on to DirectX 12 and Vulkan. When the 2008 game asks for an old-school rendering device, your modern driver shrugs its shoulders, and the game throws a fatal error.
the latest client directly from Microsoft or a trusted archive. Run the installer as an Administrator. 2. Use the "XLiveless" Mod gta iv fatal error vds100
-refreshrate 60