you are trying to play (e.g., Black Ops 2, Modern Warfare, or a classic title)? Are you using headphones, external speakers, or a dedicated sound card
Windows Defender or third-party antivirus (looking at you, McAfee and Norton) has a nasty habit of quarantining the mss32.dll file. Why? Because MSS hooks deeply into your system's audio threads. To a heuristic scanner, that looks like a rootkit. The anti-virus doesn't kill the game; it just steals the voice box. Call of duty exe err mss init failed 150
Run this program in compatibility mode for Windows XP (Service Pack 3) Verify Game Integrity Corrupted MSS files (like ) can cause this specific error. : Right-click the game > Properties Installed Files Verify integrity of game files Battle.net : Select the game > click the next to the Play button > Scan and Repair Summary Table: Key Fixes Potential Cause No Active Microphone Plug in a microphone or headphones to the 3.5mm jack. Missing "Stereo Mix" Enable "Stereo Mix" in Windows Sound Settings. Corrupt Audio Drivers Reinstall drivers from the manufacturer's official site. File Permissions Run the application as an Administrator. audio driver for your PC model or instructions for a different Call of Duty cod2_mp.exe stopped working solution fix Window 10 8 7 10 Dec 2017 — you are trying to play (e