If you’re on Steam, the files might just be bruised or missing. Right-click on Black Ops II in your library and select Properties Installed Files Verify integrity of game files
Download the from Microsoft .
Under the tab, change the Default Format to 2 channel, 16 bit, 44100 Hz (CD Quality) or 24 bit, 48000 Hz (DVD Quality) . Click Apply and restart your computer. 4. Direct Asset/Language Reload