How to fix New Key Failed to Generate Error and Attestation Failure in Modern Warfare 4
Call of Duty: Modern Warfare 4 requires a successful device attestation to access online modes, including Multiplayer and DMZ. The article says the “New Key Failed to Generate” error means the PC is not meeting the game’s requirements, and outlines steps that may resolve it.
It recommends enabling Secure Boot and updating the motherboard BIOS, then checking the system with Activision’s Attestation Check app. If the key still fails, restarting the PC may help; the article also describes using PowerShell to address TPM readiness before running another scan. BIOS update steps vary by motherboard, and the article advises using the manufacturer’s official website.
In short
- Attestation errors can block Multiplayer and DMZ.
- Enable Secure Boot and update the BIOS.
- Restart and check TPM status with Activision’s tool.