Substitute <drive letter> in the command above with the actual drive letter (e.g.: “E”) of the fixed or removable drive you want to unlock. Also, substitute <recovery key> in the command above ...

Go to the BitLocker Drive Encryption page in the Control Panel and click the Turn off auto-unlock link. Now, restart your system and re-enable this feature again.

Wait for BitLocker to initialize the drive and set a password for the drive. Next, specify where you want to save the recovery key, which you can use in case you forget the password.

When you enable encryption for a drive manually, you have a few options for setting up BitLocker, and one that you should pay attention to is the option to automatically unlock the drive on this PC.