KB5094126 is not in the provided context, but the behavior described (BitLocker/Device Encryption unexpectedly prompting for recovery after an update) matches known BitLocker/firmware/update interactions and recent known issues.
From the available information, there is no supported way to:
- Bypass BitLocker recovery without the recovery key, or
- Extract a clear key from WinRE/Command Prompt when the device is already in recovery.
BitLocker is explicitly designed so that, if the recovery key is not available in any of the standard backup locations, neither Microsoft nor an administrator can decrypt the volume or bypass recovery. This is confirmed in the referenced Q&A items: if the key is not available, the only remaining option is to wipe the drive and reinstall Windows.
Key points from the context that apply to this scenario:
- Recovery key is mandatory once in recovery mode
When a device enters BitLocker recovery (for example, after a firmware, Secure Boot, TPM, or system update that changes measured components), the only supported way to unlock the drive is to enter the 48‑digit recovery key. If the key is correct, Windows starts normally. - Where the recovery key might be stored
Even for local accounts, BitLocker/device encryption may have stored the key in one of these locations:- A Microsoft account that was used at any point on the device (for example, during initial setup or when signing into Store/Edge/Office). Keys can be checked via the Microsoft account device recovery page referenced in the Q&A.
- An organization’s Microsoft Entra ID (Azure AD) or Intune, if the device was ever joined or enrolled.
- Printed or exported copies, or saved to a USB drive, file share, or other offline storage at the time BitLocker was enabled.
- No Microsoft-side recovery if the key is missing
The Q&A references explicitly state that if the recovery key is not available in any of the documented locations, it cannot be retrieved by anyone, including Microsoft support. The same applies here: there is no supported Microsoft tool or backdoor to extract a temporary clear key from a drive that is already in recovery. - Updates and BitLocker behavior
Documentation notes that some updates (TPM firmware, UEFI/Secure Boot changes, or certain Windows updates) can cause BitLocker to enter recovery if BitLocker was not suspended beforehand. For some recent Windows updates, Microsoft has acknowledged that users might see a BitLocker recovery screen after installing the update, especially when Device Encryption is enabled. The documented mitigation in those cases is to enter the recovery key; there is no mention of a rollback path that avoids the need for the key once the device is already in recovery. - Rollback/uninstall of the update
Uninstalling or rolling back the update from WinRE/Command Prompt requires access to the OS volume. Because the volume is protected by BitLocker and is in recovery mode, the recovery key is required before any rollback can be performed. There is no supported method to uninstall the update without first unlocking the BitLocker-protected volume. - Last-resort option if the key cannot be found
If the recovery key cannot be located in any of the standard locations and the drive cannot be unlocked, the only remaining option is to:- Repartition/format the drive, and
- Reinstall Windows (for example, using installation media or a vendor recovery image).
- Preventive guidance for future updates
For future updates, especially those involving firmware, TPM, Secure Boot, or non‑Microsoft update mechanisms, documentation recommends:- Ensuring BitLocker recovery keys are backed up and accessible for all devices.
- Suspending BitLocker before applying certain non‑Microsoft firmware/BIOS/TPM updates or updates that modify UEFI/Secure Boot configuration. If such updates are applied without suspending BitLocker, the computer can enter recovery and require the recovery key.
Given the constraints in the provided material:
- There is no documented workaround to bypass BitLocker recovery or extract a clear key via WinRE/Command Prompt once the device is in recovery and the key is unavailable.
- Recovery without data loss is only possible if the BitLocker recovery key can be located and entered.
- If the key cannot be found, wiping and reinstalling the OS is the only supported path to restore the devices.
References:
- Windows devices for home users, businesses, and schools with Microsoft-managed updates
- Prompted for BitLocker recovery key after installing updates to Surface UEFI or TPM firmware on Surface device
- BitLocker FAQ
- July 9, 2024—KB5040456 (Monthly Rollup)
- July 9, 2024—KB5040485 (Monthly Rollup)
- Request for Assistance with BitLocker Recovery – Surface Pro 2 - Microsoft Q&A
- I WANT TO FIND MY BITLOCKER RECOVERY KEY FOR MY COMPUTER - Microsoft Q&A