Lenovo IdeaPad U455 - Manual (Page 40)

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Chapter 2. Learning the basics
OneKey Rescue system button ( )
• When the computer is powered off, press this button to enter the
OneKey Rescue system if Lenovo OneKey Rescue system has been
preinstalled.
• Under Windows operating system, press this button to start Lenovo
OneKey Recovery.
Volume buttons ( ~ )
Mute/Unmute
Volume down
Volume up
Note: For details, see “OneKey Rescue system” on page 39.