The file d3ddrv.dll is a Direct3D patch for the Deus Ex game by Eidos Interactive.  This file patches the game to allow multiplayer gaming and to fix bugs in the graphics on some 3D video cards.  Deus Ex is a first-person shooter game set in a cyberpunk universe.

An error with this file will cause Deus Ex to not run properly.  You may need to install the latest version of the software to fix the problem, but you might also be able to repair the problem by cleaning your system’s registry.

Whenever you get a dynamic link library (dll) file error, you should consider cleaning the registry.  Every file installed on your computer has an entry in the registry, and if there is a mistake in that entry, Windows won’t be able to find and run the file, causing an error.  Cleaning the registry is finding and fixing those mistakes.

ZookaWare PC Cleaner cleans up registry mistakes.  ZookaWare PC Cleaner hunts down registry errors and repairs them, getting your computer back to full health.