Right-click on (Multiplayer, Zombies, or Singleplayer). Select Properties > Installed Files . Click Verify integrity of game files .
Black Ops 2 is an old game. It relies on older C++ libraries and DirectX 9 components that Windows 11 doesn't install by default. call of duty black ops 2 error sound bank failed to load
Modern Windows has DirectX 12, but BO2 needs DX9 legacy audio libraries. Right-click on (Multiplayer, Zombies, or Singleplayer)