Compaq Armada 7400 Reference Manual page 85

Once you have enabled DriveLock protection and established user
and master passwords, you can only delete the passwords after the
computer has restarted and the protected hard drive has been
unlocked. Removing DriveLock protection deletes both the user
password and the master password.
1. Turn on or restart the computer and enter your current user
password.
2. Run Computer Setup.
3. Select the System Features icon Æ Security Management box
Æ DriveLock tab.
4. In the Current Drive section, select either hard drive bay or
MultiBay.
5. In the Drive Protection section, select Remove.
6. Enter the master password.
7. Enter the master password again to verify it.
8. Select OK Æ Save and Exit.
The changes will take place when you exit Computer Setup.
After you set the power-on password, you must enter it each time
you turn on or restart the computer or resume from Suspend or
QuickLock/QuickBlank.
When the power-on password prompt displays, enter your power-
on password.
If you type the password incorrectly, you are prompted to reenter
it up to three times.
Security