If the game launched once but now fails, your configuration file might be corrupt. In your game folder, open the Delete the files ending in hardware.chp hardware_zm.chp
Launch the game; Black Ops 2 will automatically generate clean configuration files matching your current hardware setup. Fix Sound Device Mismatches If the game launched once but now fails,
This built-in Windows tool scans for and repairs corrupted system files that might be interfering with the game. 940 words If nothing else works, a clean
940 words
If nothing else works, a clean slate might be your best bet. Click Steam in the top-left corner and open Settings
The most frequent cause of this error stems from a mismatch in Steam's 64-bit infrastructure updates. Launch your . Click Steam in the top-left corner and open Settings . Select the Interface tab from the left sidebar. Look for Client Beta Participation .