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COD MW4 BIOS update can block online play if your PC lacks TPM 2.0 or Secure Boot—learn the exact steps to patch your firmware now. Read the full guide on 217G.
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![COD MW4 BIOS Update Guide: TPM 2.0 & Secure Boot Fix [Confirmed]](https://cdn.mos.cms.futurecdn.net/ADf8vRbBtWTiViXXLTEKWT-1920-80.jpg)
COD MW4 requires TPM 2.0 and Secure Boot enabled before playing multiplayer or DMZ on PC. Avoid startup crashes and fix your BIOS settings on 217G today.
⚡Activision confirmed that Call of Duty: Modern Warfare 4 strictly mandates TPM 2.0 and Secure Boot PC firmware upgrades before accessing online multiplayer servers.
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