Call Of Duty Exe Err Mss Init Failed 150 -

Corrupted Realtek drivers are a prime suspect for Error 150.

To do a clean install:

Try launching the game with these command line arguments (in Battle.net/Steam): Call of duty exe err mss init failed 150

If the error disappears with -nosound, your audio drivers or a sound enhancement app (Nahimic, Sonic Studio, Voicemeeter) is the root cause.

Microsoft security updates in 2021–2024 (specifically KB5003637 and KB5028244) broke legacy audio engines like MSS. Corrupted Realtek drivers are a prime suspect for Error 150

If the error started after a Windows Update:

After combing through crash logs, Reddit threads, and Activision support tickets, the ERR_MSS_INIT_FAILED 150 error almost always boils down to one of three conflicts: Try launching the game with these command line

Call of Duty relies heavily on DirectX for multimedia tasks, including audio. If your DirectX installation is corrupted, the MSS initialization will fail.

Error 150 loves chaos. If your PC detects 3 or 4 audio outputs (e.g., NVIDIA High Definition Audio via your monitor + Realtek speakers + USB headset), the game doesn't know where to send the sound.

Step-by-step:

Do not uninstall – just right-click and select Disable device.

Repeat in the Audio inputs and outputs section (disable all microphones except your main one).

Restart the game.