: If you are playing on Steam, right-click Call of Duty 2 in your Library, select Properties > Installed Files , and click Verify integrity of game files . This automatically replaces missing or corrupted files. Reinstall DirectX
Here is a comprehensive guide to fixing this error and getting back into the action. Check the Quarantine Folder
To fix the "mss32.dll missing" Call of Duty 2 , you need to restore the Miles Sound System file to your game directory
