In Win11, C: drive is locked by BitLocker.

Hi!

Before proceeding, I recommend signing into your Microsoft account on another device to double-check that the recovery key you have is the one associated with the affected computer. Once you’ve confirmed that, boot into the Windows Recovery Environment and at the command prompt try the command

manage-bde -unlock C: -RecoveryPassword YOUR-48-DIGIT-KEY

to unlock the drive. If that key still doesn’t work, it is likely that either an incorrect key is being used or the recovery data is mismatched with the current BitLocker configuration on your PC. In that case, there is no registry trick or override available, and you would need to contact Microsoft support for further assistance or consider recovery options knowing that any bypass attempt is unsupported.

There is no 'manage' recognized in X:, the only drive accessible. 'Manage' is probably available only on C:.

X: drive contains /windows/system32 where it lists .sys files, some of which are named unlock and lock.

Does anyone know what they control?

The registry is accessible through CMD. There are many keys that may cause an unlock.

I'm hopeful that someone has a deep knowledge of the registry.

It sounds like the recovery key you’re getting isn’t matching the locked PC’s BitLocker configuration. BitLocker recovery keys are specific to the device that was encrypted, so when you use another computer, the key shown is for that machine rather than the one that’s locked. Unfortunately, there isn’t any file on the X: drive or a registry setting that can override BitLocker.

I still recommend to sign into your Microsoft account on a working device, confirm that the recovery key listed is for the locked computer, then boot into the Windows Recovery Environment on the locked device and run the command

manage-bde -unlock C: -RecoveryPassword your-48-digit-key

If that key still doesn’t unlock the drive, the recovery data might be mismatched with the current BitLocker configuration, and in that case you would need to contact Microsoft Support for further assistance.

Thank you for your response. When using the aka site, it autofills the "requesting" pass key. I assume it is returning the unlock key for this computer. It does not work for the locked computer. Have not found a way to actually enter the locked computer's unlock key for the unlock key.

If that's a retail computer (i.e., not previously part of an organization) and whomever last setup the computer did the install by the book, then the BitLocker recovery key for the computer is stored in the Microsoft account that was used to setup Windows on the computer. It isn't anywhere else, unless you or someone else made backup copies of the recovery key.