Compaq Bluetooth Headset - Manual (Page 30)

If the computer is unresponsive and you are unable to use the preceding shutdown procedures, try the
following emergency procedures in the sequence provided:
● Press ctrl+alt+delete , and then click Shut down.
● Slide and hold the power switch for at least 5 seconds.
● Disconnect the computer from external power and remove the battery.
22 Chapter 2 Power management