Hello Aryan Yadav2,
thank you for posting on the Microsoft Community Forums.
During the update process, hardware changes (such as SSD or memory) may have been detected, and BitLocker will consider this to be an unauthorized change and lock the drive. Unfortunately, without the recovery key, it is very difficult to unlock a BitLocker-protected drive. Here are a few steps you can take to try and recover your BitLocker key:
- Check Your Microsoft Account: As you mentioned, you already checked your Microsoft account but didn't find the key. It might be worth double-checking by logging into your account again and navigating to the BitLocker recovery keys section.
- Check Other Microsoft Accounts: If you have any other Microsoft accounts (e.g., work or school accounts), log into those accounts and check for the recovery key.
- Look for a Printout or USB: When you first enabled BitLocker, you might have been prompted to print the recovery key or save it to a USB drive. Check any printed documents or USB drives you may have used.
- Contact Your Administrator: If your laptop is managed by an organization (e.g., your employer or school), contact your IT department. They may have a copy of your BitLocker recovery key.
- Check Cloud Storage: If you saved the recovery key to a cloud storage service (e.g., OneDrive, Google Drive, Dropbox), check there.
- Look in Active Directory: If your PC is part of a domain, the BitLocker recovery key might be stored in Active Directory. You would need to contact your system administrator for assistance.
Additionally, this official article might be useful for you: Finding your BitLocker recovery key in Windows - Microsoft Support.
Important: Microsoft support is unable to provide, or recreate, a lost BitLocker recovery key.
Best regards,
Lei