HP ProBook 6555b Notebook-PC - Manual (Page 131)

Entering a DriveLock password
Be sure that the hard drive is inserted into the computer (not into an optional docking device or external
MultiBay).
At the DriveLock Password prompt, type your user or master password (using the same kind of keys
you used to set the password), and then press
enter .
After 2 incorrect attempts to enter the password, you must shut down the computer and try again.
Using passwords 121