relies on specific legacy files from DirectX 9 to load audio correctly. Steam Community Download and install the DirectX End-User Runtime Web Installer from official sources. Alternatively, check the folder in your game directory and run the DXSETUP.exe found inside the subfolder. Steam Community
If a specific sound bank file like zmb_patch.all is corrupted, the game will fail to launch. : call of duty black ops 2 sound bank failed to load fix free
When launching the game or attempting to start a mission/multiplayer match, the application halts and displays a dialog box reading: relies on specific legacy files from DirectX 9