Win 8 Forgot your password How to unlock BitLocker

Using BitLocker Drive Encryption helps protect all files stored on Windows-installed drives (operating system drives) and fixed data drives (such as internal hard drives). Files remain encrypted only when they are stored on an encrypted drive. Files copied to other drives or computers will be decrypted. If you share files with other users (for example, over a network), they will remain encrypted when they are stored on an encrypted drive, but authorized users can usually access them. (BitLocker To Go reader is used to unlock encrypted drives on computers running Windows Vista or Windows XP.)

Solution:

Decrypt using recovery key, if recovery key Lost, at least for a limited time, is unbreakable. Unfortunately, you can only reformat the disk partition.

Make sure this recovery key is created the first time BitLocker is enabled; otherwise, access to the file may be permanently lost. If the computer has a Trusted Platform Module (TPM) chip, BitLocker will use it to seal the keys used to unlock the encrypted operating system drive. When you start your computer, BitLocker asks the TPM to provide the driver's key and unlock it. The following figure shows the key recovery process: