bitloker encryption error

Muhammad Awais 1 Reputation point
2021-03-07T09:25:20.437+00:00

i have my drives encrypted while ago , at that time i was using microsoft windows 10 pro education version which i recieved from my University , One month ago , i have installled new windows , Now my bitlocker drives are not accepting the correct password , morever when i insert the recovery key it shows the error "digit group 1 contains an error bitlocker Encryption Error" , Plz help me to solve the issue as my drives contains alot of important data and i cant take the risk of losing important data....Waiting for ur reply

Windows 10 Security
Windows 10 Security
Windows 10: A Microsoft operating system that runs on personal computers and tablets.Security: The precautions taken to guard against crime, attack, sabotage, espionage, or another threat.
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  1. Jenny Feng 14,081 Reputation points
    2021-03-08T02:09:37.29+00:00

    @Muhammad Awais
    Hi,
    Sometimes, BitLocker encrypted drive can be unlocked with correct password or BitLocker recovery key on another computer.
    I suggest you install all the latest updates before trying to unlock the BitLocker driver.
    Sometimes different versions of different encryption methods can also cause this problem.
    For your reference:
    https://social.technet.microsoft.com/Forums/en-US/5f8ebc1d-5f82-4e33-822f-47cd2ea2fdd9/correct-bitlocker-password-recoverykey-cant-unlock-my-drive?forum=win10itprosecurity

    While if the present BitLocker has been corrupted during the reinstalling process by coincidence, the data is lost. If there was some way to access the data without any of those things, then unfortunately the encryption would be effectively useless.
    Hope above information can help you.

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  2. MTG 1,196 Reputation points
    2021-03-08T12:01:27.58+00:00

    Hi.

    "digit group 1 contains an error bitlocker Encryption Error" - to understand that statement, please note: The bitlocker recovery passwords consist of 48 digits in 8 groups of 6 digits each. The numbers that each digit group represent have to be divisible by 11 (really, no kidding). That is why we can say with confidence that your recovery key was either entered incorrectly or was written down incorrectly.
    So the only thing you can do now, is try ALL 6digit numbers that are divisible by 11 as first digit group. That's a lot of work, so you will need to automate this using a script.

    If you need help with that, I could assist.

  3. Jenny Feng 14,081 Reputation points
    2021-03-09T07:18:55.473+00:00

    @Muhammad Awais
    Hi,
    Is the new windows system version you installed the same as before?
    If not, the present BitLocker will be corrupt during the installing process by coincidence.
    If you are sure that the recovery key is correct, I suggest you use the manage-bde command to repair your BitLocker driver.
    https://www.tenforums.com/tutorials/97390-use-bitlocker-repair-tool-recover-encrypted-drive-windows.html
    Please note: Information posted in the given link is hosted by a third party. Microsoft does not guarantee the accuracy and effectiveness of information.

    If that doesn't work, you could reinstall the previous version of the OS then try it again.