Windows 10: BitLocker asking for recovery key after KB4535680

I have installed updates from 12th january, including KB4535680.


After installation, BitLocker ask for a recovery key on boot up.

Probably because the updates added dbx modules to the UEFI.

This issue is also described here:

https://support.microsoft.com/de-ch/help/4535680/security-update-for-secure-boot-dbx

The problem at hand is, that i never knew that i`ve turned on BitLocker. Neither i know the recovery key. It is also not in my microsoft account.


I had this problem with BitLocker two times before and used this workaround for my Dell Inspiron 5580:

https://www.dell.com/community/Windows-10/BitLocker-need-a-key-but-I-never-installed-it/m-p/7427359#M14749


Unfortunately this does not work this time...


Is there a way to fix this??


E.g.

• uninstalling the update although i cannot unlock the bitlockered system drive?
• resetting the UEFI dbx changes? reflashed the firmware, but without success

:)

 

Asking for Bitlocker recovery key on login

So I was playing with BIOS settings for reformatting my laptop and reinstalling Windows using bootable USB drive. I didn't succeed and I probably did something stupid. Now I'm not able to login into my laptop. It's asking me for bitlocker recovery key on both disabled and enabled settings of secure boot.

On "Enabled" setting, it says "Bitlocker needs your recovery key to unlock your drive because Secure Boot policy has unexpectedly changed."




On "Disabled" setting, it says "Bitlocker needs your recovery key to unlock your drive because Secure Boot has been disabled. Either Secure Boot must be re-enabled, or Bitlocker must be suspended for Windows to start normally."




I don't have a recovery key. I don't remember setting one. I even searched for it in my Microsoft account. My device (ASUS X205TA) is listed but the recovery key is not.

Note that I don't have any useful data in the laptop, so I'd be fine with reinstalling windows even if I loose all the data. I just want to be able to use my laptop again.

 

BitLocker Key

There may be a software that triggered the BitLocker in your Windows 10 PC. To assist you better, we suggest that you check these articles for further information:

• Find my BitLocker recovery key.
• BitLocker recovery keys: Frequently asked questions.

• BitLocker

Let us know if you need further assistance.

 

bitlocker recovery key

Hi Singh,

Thank you for writing to Microsoft Community Forums.

In order to get clarity on this issue and assist you with appropriate troubleshooting steps, please reply with the answers to the questions below.

1. Are you not able login to your computer due to BitLocker Recovery Key?
2. Did you ever setup BitLocker Recovery Key on your computer?
3. Are you not able to login to your Microsoft Account to find the BitLocker Recovery Key?
4. Are you using Windows 10 Home or Windows 10 Professional?

Meanwhile, try finding BitLocker Recovery Key if you have ever setup BitLocker Recovery Key for your computer.

Please elaborate on the issue, so that we can understand the concern and get back to us to help you further.