If you cannot access your hard drive due to The drive protected by BitLocker is already unlocked error, use these proven fixes.

If you see This PC doesn't support entering a BitLocker recovery password during startup, enable WinRE, tweak Group Policy, verify TPM, recreate the recovery partition, etc.

What Is the “Cannot Install Windows, BitLocker Drive Encryption Is Enabled on Selected Partition” Error? Windows 11 and old versions of the Windows operating system have BitLocker Encryption ...

Bitdefender has released a decryptor for the 'ShrinkLocker' ransomware strain, which uses Windows' built-in BitLocker drive encryption tool to lock victim's files.