Você precisa ter um computador com o HP DriveLock para desbloquear a senha, mas não precisa ser o computador original.
De acordo com o site da HP :
DriveLock is an industry standard security feature that helps prevent unauthorized access to the data on specific hard drives. DriveLock has been implemented as an extension to Computer Setup. It is only available on certain systems and only when DriveLock capable hard drives are detected.
De acordo com um documento oficial da HP :
A hard drive protected with a DriveLock password stays protected, even if the drive is removed from one system and inserted into another. At power-on, the system prompts the user for the DriveLock password. If an incorrect password is entered, the information on the hard drive is inaccessible.
The DriveLock password is stored inside the hard drive itself and cannot be read; it can only be authenticated against. Therefore, an unauthorized user cannot obtain the DriveLock password from the hard drive itself.