BitLocker Fails on TPM+PIN/USB After Incomplete KB5083769 Uninstall

Hi ORDYLAN,

I understand this is a really stressful situation, especially with BitLocker involved and the system ending up in an inconsistent state after an interrupted rollback. Like what the Q&A Assist explained, this is not a known documented bug for KB5083769.

From my experience, this might be BitLocker TPM‑binding corruption caused by an interrupted rollback / boot chain change. You likely need to recreate the TPM-bound protectors so they bind to the current PCR state. Here’s what to do:

1 - Before applying the fix

• Make sure you have your BitLocker recovery key backed up.
• Ensure you can still boot via Windows recovery.
• Validate the root cause:
  • Open Command Prompt (Admin) > run manage-bde -protectors -get C:
  • If TPM & PIN protectors exist and decrypt normally > binding mismatch.

2 - Re-seals the key against your current platform state

• Boot into Windows and open Command Prompt (Admin)
• Run the following commands to remove broken protectors:
  • manage-bde -protectors -delete C: -type TPMAndPIN
  • manage-bde -protectors -delete C: -type TPMAndStartupKey
• Then re-add them one by one:
  • manage-bde -protectors -add C: -TPMAndPIN
  • manage-bde -protectors -add C: -TPMAndStartupKey E: (optional)
• Restart your PC and check if everything is running normal now.

3 - If it’s still broken, then you’re likely dealing with deeper corruption

• Temporarily suspend BitLocker: manage-bde -protectors -disable C:
• Then re-enable: manage-bde -protectors -enable C:
• Restart your PC one more time to check.

If the issue persists after everything, unfortunately, you might need to fully decrypt and re-encrypt the drive to guaranteed clean state.

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The provided context does not document KB5083769 or any BitLocker issue that matches “TPM+PIN/USB fails only after an interrupted rollback of KB5083769.” There is no mention of this update, nor of a bug with the exact behavior described (TPM-only and USB-only working, but TPM+PIN and TPM+USB failing) as a known issue.

From the available BitLocker material, only the following related facts are documented:

• BitLocker can be forced into recovery or fail to unlock when:
  • PCRs or the TPM validation profile change, including changes to Secure Boot, firmware, or boot components.
  • The PCR profile is not the expected one (for example, not using PCR 7/11 on systems that support Secure Boot) and firmware changes occur.
• Known issues include:
  • TPM 1.2 devices with Credential Guard/Device Guard and Secure Launch enforced, where BitLocker prompts for recovery at every restart with error 0xC0210000. The mitigation is to remove the device from Secure Launch GPO scope or disable Secure Launch in the “Turn On Virtualization Based Security” policy.
  • Surface devices entering recovery after UEFI/TPM updates when the PCR profile is not the default (PCR 7, 11), requiring verification and correction of the BitLocker PCR profile and TPM protectors.
  • A Windows 11 24H2 scenario where uninstalling a cumulative update and rolling back to a build earlier than 26100.4770 after installing KB5063878 or later can cause BitLocker PIN unlock failure, resolved by unlocking with recovery and installing KB5062660 or later.

None of these map to KB5083769 or to an interrupted rollback of that update.

Because the context does not describe KB5083769 or a TPM+PIN/USB failure pattern tied to its rollback, this specific issue is not documented here as a known BitLocker bug.

References:

• BitLocker recovery: known issues
• BitLocker recovery overview
• BitLocker FAQ
• Troubleshooting BitLocker policies from the client side
• Guidance for blocking rollback of Virtualization-based Security (VBS) related security updates
• BitLocker check after firmware update
• BitLocker recovery key prompt on the Surface Book 2 13" after the August 2018 UEFI update