How to Fix the Warzone Failed Attestation Error

Quick fix — Warzone “failed attestation” in 30 seconds

The Warzone “failed attestation” error means your PC hasn’t passed Black Ops 7’s new Microsoft Azure Attestation (MAA) security check — and the fix is almost always to enable two BIOS settings: TPM 2.0 and Secure Boot. Switch both on, reboot, and you’re back in the full playlist rotation. If you’re on AMD and they’re already on, you most likely need a BIOS/firmware update — Activision flagged that older AMD fTPM software (the 3.x.0.x range) trips the check.

Current for Black Ops 7 / Warzone Season 4 (June 2026), when MAA was switched on. Last checked June 2026 — give it a spot-check if you’re reading this much later.

Requirement	How	Verify
TPM 2.0	BIOS → enable Intel PTT or AMD CPU fTPM	tpm.msc → “The TPM is ready for use”
Secure Boot	BIOS → Boot/Security → Secure Boot: Enabled	msinfo32 → Secure Boot State: On
AMD, still failing	Update motherboard BIOS/firmware	Re-run the game’s check
Can’t enable it?	You’re capped to BR Casual (Warzone) / Nuketown 24/7 (BO7)	—

What “failed attestation” actually means

No need to panic — it’s not a ban and it’s nothing wrong with your account. From Season 4, Call of Duty’s RICOCHET anti-cheat uses Microsoft Azure Attestation (MAA) to confirm your PC is a secure, untampered environment before it’ll let you into the full playlists. Pass and everything’s normal; fail and you’re benched — limited to Battle Royale Casual in Warzone (and Nuketown 24/7 over in Black Ops 7) until you sort it. It’s a hardware/firmware requirement, and it’s the same direction Battlefield and other big titles are heading. Two boxes need ticking: TPM 2.0 and Secure Boot.

How to enable TPM 2.0

TPM is a little security chip (or firmware feature) nearly every PC from the last several years already has — it’s often just switched off.

1. Reboot into your BIOS/UEFI — mash the board’s key as it powers on (usually Del or F2; sometimes F10/F12).
2. Find the TPM setting — it hides under Security, Advanced, or Trusted Computing, depending on the board.
3. Turn it on:
   • Intel: enable Intel PTT (Platform Trust Technology), or “Security Device Support”.
   • AMD: enable AMD CPU fTPM.
4. Save & exit (usually F10).

Check it took: hit Win + R, type tpm.msc, and look for “The TPM is ready for use” with Specification Version 2.0.

How to enable Secure Boot

1. Quickest way into BIOS from Windows: search “Change advanced startup options” → Restart now under Advanced startup → Troubleshoot → Advanced options → UEFI Firmware Settings → Restart.
2. In BIOS, find Secure Boot (usually under Boot or Security) and set it to Enabled.
3. Save & exit.

The classic gotcha: Secure Boot only works if Windows is installed in UEFI mode on a GPT disk. If you’re on Legacy/MBR, the option will be greyed out — you’d need to convert first (Microsoft’s mbr2gpt tool) before it’ll switch on. Check your setup in msinfo32: “BIOS Mode” should read UEFI and “Secure Boot State” should read On once you’re done.

On AMD and still failing? Update your BIOS

Activision called this one out directly: older AMD fTPM software (versions in the 3.x.0.x range) can error during attestation even with everything enabled. The fix is a motherboard BIOS/firmware update from your board maker — ASUS, MSI, Gigabyte, ASRock and co. all post the latest on their support page for your exact model. Update, re-enable fTPM if the update reset it, and re-run the game’s check. Bob’s your uncle.

Verify you’re sorted

• tpm.msc → “The TPM is ready for use”, version 2.0. ✅
• msinfo32 → Secure Boot State: On, BIOS Mode: UEFI. ✅
• Steam also added a built-in Secure Boot status check in its hardware info, if you’d rather glance there.
• Relaunch Call of Duty — the attestation prompt should clear and the full playlists unlock.

Still stuck? Troubleshooting

• Setting greyed out or missing? Usually the Legacy-vs-UEFI thing above, or a BIOS that’s simply too old — update it.
• Enabled everything but AMD still fails? It’s the fTPM version — update the BIOS (see above).
• Don’t fancy touching BIOS right now? You can still play — you’re just capped to BR Casual (Warzone) / Nuketown 24/7 (BO7) until you enable it.
• Always back up anything important before BIOS changes, and only touch the settings named here — leave the rest well alone.

Sources & how we keep this current

We cross-check fixes like this against the official notes plus the PC-hardware coverage, and re-stamp the page when the requirement changes. Last checked June 2026 (BO7 / Warzone Season 4).

• Official Call of Duty — Season 04 Patch Notes (RICOCHET / MAA requirement, AMD fTPM note): callofduty.com
• Dexerto — How to enable TPM 2.0 & Secure Boot: dexerto.com
• Dot Esports — How to enable TPM 2.0 for Black Ops 7: dotesports.com
• PC Gamer — Remote Attestation explainer: pcgamer.com

Still locked out after all that? Drop into our Warzone Discord and someone will talk you through it. More fixes and guides live on the guides page.