Moved provisionally to Encryption: EEM Managed.
If the system is only 8 months old, the HP Protect Tools should be newer than 2011. Although the backend of HP Protect Tools and McAfee Drive Encryption are the same, the functionality is somewhat different and the recovery tools are available from HP.
However, it appears the disk itself may be inoperable and the recovery tool will not be able to decrypt the disk if it is physically damaged. I would suggest opening a case with HP to provide guidance on verifying the state of the hard disk and provide the correct tools to decrypt the drive.