Turn off the computer.
Remove the computer from any port replicator or docking station.
Disconnect all external connected peripheral devices such as USB storage devices, external displays, and printers.
Unplug the AC adapter from the computer.
For most laptops, press and hold the Power button for 15 seconds to reset.
If your laptop model is listed below, use the instructions specific to your computer.
HP ENVY 17 2D and 3D: Press and hold the Power button and the Beats button (marked with a red circle around a lower-case "b") for 8-10 seconds.
HP ENVY 15-3000 series: Press and hold the Power button and the Beats button (marked with a red circle around a lower-case "b") for 8-10 seconds.
HP Folio 13: Press and hold the Power button for 8-10 seconds.
HP ENVY 14 SPECTRE: Press and hold the Power and Mute buttons (on the right side of the palm rest) for 8-10 seconds.
HP EliteBook Folio 1040 G1: Press and hold the Power and Mute buttons at the same time for 15 seconds or until the computer restarts.
HP EliteBook Folio 1040 G2: Press and hold the Power and Mute buttons at the same time for 15 seconds.
Most other laptop models: Press and hold the Power button for 15 seconds.
Plug the AC adapter back into the laptop computer, but do not connect any of the peripheral devices.
Press the Power button to turn on the computer.
The computer starts normally or a startup menu opens.