If you’re seeing the “Failed Attestation Status” message in Call of Duty, the game cannot verify your PC’s security configuration. This usually happens when TPM 2.0, Secure Boot, UEFI boot mode, or other required security features are disabled, misconfigured, or blocked by third-party software.
The good news is that most players can resolve the issue by verifying Windows security settings, enabling TPM and Secure Boot, updating BIOS firmware, and approving the official attestation prompt.
What Does Failed Attestation Status Mean in Call of Duty?
The Failed Attestation Status error appears when Call of Duty’s anti-cheat or security validation system cannot confirm that your PC meets required security standards.
Common triggers include:
- TPM 2.0 disabled
- Secure Boot disabled
- Legacy BIOS mode instead of UEFI
- Outdated motherboard firmware
- Denied Windows security prompts
- Security software conflicts
- Unsupported boot modifications
In most cases, the error is related to system security verification rather than your Activision account.
Quick Diagnostic Table
| Check | What To Do | Priority |
|---|---|---|
| TPM 2.0 Disabled | Verify TPM is present and enabled | High |
| Secure Boot Off | Enable Secure Boot in BIOS/UEFI | High |
| Outdated BIOS | Install latest firmware update | High |
| UAC Prompt Denied | Relaunch and approve attestation request | High |
| Legacy Boot Mode | Convert to UEFI mode if supported | Medium |
| Third-Party Tools | Remove unsupported overlays or spoofers | Medium |
| Corrupted Game Files | Scan and repair installation | Medium |
Fast Fix Checklist
Before attempting advanced troubleshooting:
✓ Restart your PC
✓ Close Battle.net or Steam completely
✓ Install all Windows updates
✓ Verify TPM 2.0 is active
✓ Confirm Secure Boot is enabled
✓ Approve any Windows security prompts
✓ Update motherboard firmware
✓ Repair Call of Duty game files
✓ Remove unsupported startup modifications
How to Fix Call of Duty Failed Attestation Status
Fix 1: Verify TPM 2.0
TPM (Trusted Platform Module) is required on many modern systems.
Check TPM Status
- Press Windows + R
- Type:
tpm.msc- Press Enter
Look for:
Status: TPM is ready for use
Specification Version: 2.0
If TPM is missing or disabled, enable it in BIOS.
Intel systems may show:
- Intel PTT
AMD systems may show:
- AMD fTPM
Fix 2: Confirm Secure Boot Is Enabled
Secure Boot helps verify trusted startup components.
Check Secure Boot
- Press Windows Key
- Search:
System Information- Open the app
- Locate:
Secure Boot State
You should see:
OnIf it shows Off, enable Secure Boot in BIOS.
Fix 3: Enable UEFI Boot Mode
Call of Duty security validation may fail on older Legacy BIOS configurations.
Check Boot Mode
In System Information:
Look for:
BIOS ModeExpected result:
UEFIIf it shows Legacy, review your motherboard documentation before making changes.
Fix 4: Install Windows Updates
Outdated security components can prevent successful attestation.
- Open Settings
- Select Windows Update
- Check for updates
- Install all available updates
- Restart your PC
Pay special attention to:
- Security updates
- Platform updates
- Driver updates
Fix 5: Approve the Attestation Prompt
Many players accidentally dismiss the verification request.
- Launch Call of Duty
- Wait for the Windows security prompt
- Click Yes
- Allow verification to complete
If the prompt never appears:
- Restart Windows
- Launch the game as Administrator
Fix 6: Update BIOS Firmware
Older firmware can trigger false attestation failures.
Before Updating BIOS
- Back up important files
- Connect a stable power source
- Download firmware only from your manufacturer
Common manufacturers include:
- ASUS
- MSI
- Gigabyte
- ASRock
- Dell
- HP
- Lenovo
Install the latest stable BIOS version available for your model.
Fix 7: Remove Unsupported Utilities
Certain applications interfere with security validation.
Potential conflicts include:
- Hardware spoofers
- Kernel-level modification tools
- Unauthorized game utilities
- Boot modification software
- Security bypass tools
Remove these applications and restart your system.
Fix 8: Repair Call of Duty Files
Battle.net
- Open Battle.net
- Select Call of Duty
- Click Settings
- Select Scan and Repair
Steam
- Open Steam Library
- Right-click Call of Duty
- Select Properties
- Installed Files
- Verify Integrity of Game Files
Allow the process to finish before relaunching.
Fix 9: Perform a Clean Boot
Background software may interfere with attestation.
- Press Windows + R
- Type:
msconfig- Open Services tab
- Hide Microsoft services
- Disable remaining services
- Restart Windows
Launch Call of Duty and test again.
Common Mistakes to Avoid
| Mistake | Why It Causes Problems |
| Reinstalling immediately | Usually does not fix security settings |
| Flashing BIOS first | Adds unnecessary risk |
| Disabling Windows Security | Can worsen verification failures |
| Using unofficial fixes | May trigger anti-cheat warnings |
| Changing multiple settings together | Makes troubleshooting difficult |
The Bottom Line
The Call of Duty Failed Attestation Status error is usually caused by TPM 2.0, Secure Boot, UEFI configuration, outdated firmware, or blocked security verification. Start with Windows updates and security checks before making BIOS changes. Most players resolve the issue by enabling TPM and Secure Boot, updating firmware, and approving the official attestation request.
Following the fixes above in order will help you identify the root cause without making unnecessary system changes.
Last Updated: June 14, 2026