Windows 10: bitlocker key is not working after windows downgrading to lower version

i have downgraded windows 10 pro 1909 to older window 10 pro 2015...but BitLocker key is not working now...how can i unlock BitLocker ? pls help me...thank you

:)

 

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

Hello Nandana,

To enable BitLocker on your computer, you follow the steps below:

• Sign in to your Windows account with an administrator access.
• Press the Windows key.
• Type and enter BitLocker.
• Click Turn on BitLocker.
• If the system is asking to sing in to administrator access, please do so.

For additional information about BitLocker, we suggest that you check the frequently ask question on this
link. The link provided applies to Windows 8.1 to higher version.

If you have other concerns, don't hesitate to reach us.

 

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.