Failed Attestation Status Warzone: TPM 2.0 and Secure Boot Fix Guide

Warzone PC attestation status failed — updated on June 9, 2026 with a practical diagnostic flow, quick table, and safe fixes.

What does this error mean?

Failed Attestation Status in Warzone usually means the PC did not pass the game security validation for TPM 2.0, Secure Boot, firmware or attestation prompts. Check Windows Security first, then confirm UEFI, TPM and Secure Boot in BIOS, update firmware carefully, and allow the official attestation prompt when it appears.

Quick diagnostic table

Check	What to do	Priority
TPM 2.0 disabled	The system cannot prove the expected trusted platform state.	First
Secure Boot disabled	The boot chain is not validated in the way the game expects.	High
Legacy BIOS mode	Secure Boot generally requires UEFI mode, not legacy boot.	High
Outdated BIOS firmware	Some systems report compliance incorrectly until firmware is updated.	Medium
Denied UAC prompt	Closing or denying the attestation prompt can stop validation.	Medium

Fast fix checklist

Open Windows Security and check Device Security for TPM and Secure Boot status.
Press Win + R, run tpm.msc and confirm Specification Version says 2.0.
Open System Information and confirm BIOS Mode is UEFI and Secure Boot State is On.
If Secure Boot is off, enter BIOS/UEFI and enable Secure Boot only after confirming the disk uses GPT.
Enable Intel PTT or AMD fTPM if the TPM module is disabled.
Install pending Windows updates and restart twice if required.
Update motherboard or laptop BIOS only from the device manufacturer and follow their instructions exactly.
Start Warzone as a normal user and approve the official UAC attestation prompt when it appears.
Avoid registry hacks, spoofing tools or unofficial attestation downloads.
If you still see reduced matchmaking, collect screenshots and contact Activision support with your hardware model.

Expert tip

Do not flip Secure Boot settings blindly on an older Windows install. Confirm UEFI and GPT first, because legacy/MBR systems may fail to boot after the wrong firmware change.

Detailed fix guide

If the quick checklist did not solve failed attestation status warzone, work through the fixes slowly and test after each major change. Avoid changing several settings at once because you will not know which one actually fixed the issue.

Start with the simplest checks: restart the affected app or game, test a stable connection, and confirm whether other users are reporting the same symptom. If the issue is service-side, aggressive local changes will not help and may create extra problems.

Next, focus on authentication and permission. Many failed-status messages are not caused by broken hardware; they happen because the app cannot verify your session, cannot access a required background component, or cannot pass a security check.

Finally, document what you changed. If you need support, screenshots of the exact message, device model, app version, operating system version and steps already tried will help support teams avoid repeating generic advice.

Common mistakes to avoid

Mistake	Why it hurts	Better action
Reinstalling immediately	It wastes time and may not touch the real cause.	Repair, update or reset cache first.
Using unofficial tools	They can add security risk or violate service rules.	Use official settings and vendor support.
Changing many settings together	You cannot identify the real fix.	Change one setting, test, then continue.

Frequently asked questions

What does Failed Attestation Status mean in Warzone?

It means your PC did not complete or pass the security attestation required for normal matchmaking.

Can I play Warzone without Secure Boot?

Current PC security requirements may restrict or reduce access when Secure Boot and TPM 2.0 are not enabled.

Is BIOS update always required?

No. Update BIOS only when your manufacturer recommends it or when attestation still fails despite correct settings.

Related internal fixes

Use these internal links to move readers to the most relevant troubleshooting page.

failed to load player profile war thunder failed to find vscode-ripgrep please install ripgrep manually and set ‘todo-tree.ripgrep connection to server failed iphone mail the failed sage academy domination release date warthunder failed to load player profile failed attestation status call of duty tts-models_preview download failed authentication failed yahoo mail

Final recommendation

For failed attestation status warzone, use the safest fix path first: verify the service or account, reset the local app state, then change advanced settings only when the basic checks fail.

Post Views: 9