• asking for bitlocker recovery key every reboot

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    #2503142

    Got my T490 back from repair–mainboard had to be replaced.

    The drive is asking for bitlocker recovery key every reboot.

    Is there a relatively simple way to stop this, to get the machine to recognize that I am me and trust me?

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    • #2503166

      Open up the drive section, go to the c drive and turn off bitlocker to start with.  Do you want bitlocker enabled?

      Susan Bradley Patch Lady

    • #2503308

      If you find the bitlocker setting can’t be turned off it can be a policy from the BIOS – the problem here seems likely to be the TPM in use was soldered to the failed motherboard.

      It might be possible to manage the boot tokens (manage-bde -protectors etc etc), or to turn off the TPM requirements with gpedit.msc..

      But I think the first thing is to back up your stuff before doing anything (preferably just your files, off machine) as one unforeseen incident and its lost forever..

       

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    • #2503311

      Your problem is the TPM keys that were stored on the motherboard (including your Bitlocker recovery key) aren’t there anymore because it was replaced. So when you boot your PC, Bitlocker always prompts for the key because it can’t retrieve it from the TPM.

      Here’s how to update the TPM so it contains your Bitlocker key:

        Ensure TPM is active in the BIOS.
        Boot your PC and enter your Bitlocker key.
        Log in with an Administrator account.
        Open the BitLocker applet.
        Click on Manage BitLocker and select Turn off BitLocker.
        Reboot your PC.
        Log in as an Administrator again.
        Go back to Manage BitLocker and select Turn on BitLocker.

      This will store your Bitlocker key in the TPM and stop it from prompting for the key each time you boot.

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