HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers : Delete any entry for that includes RUNASADMIN Summary Table: Troubleshooting Steps Why it works Update Audio Drivers Ensures the Miles Sound System can talk to your hardware. Enable Stereo Mix Bypasses "missing device" errors in older COD engines. Scan & Repair Replaces missing or corrupted MSS DLL files. Admin Mode Overrides permission blocks preventing system init.
: Click the gear icon next to the Play button > Scan and Repair . Call of duty exe err mss init failed 150
You can force the game to use legacy, low-quality audio to bypass the error. Call of duty exe err mss init failed 150
Right-click an empty space and select . Right-click Stereo Mix and select Enable . Call of duty exe err mss init failed 150