HP Vectra XU5 Reference Manual page 37

Security Features
The PC has many security features to protect stored data, to protect the SETUP
configuration, and to prevent unauthorized operation of software applications:
user password
system administrator password
screen blanking and keyboard lock
keyboard lock timer
communications port protection (ports can be disabled in SETUP)
disk drive protection (disks can be disabled or "boot" protected in SETUP; flexible disks
can also be write-protected)
system configuration protection
cover lock and security bracket
hard-coded serial number and customisable PC identification field
Vectra XU Technical Reference System Overview 37