Lenovo IdeaPad U550 - Manual (Page 42)

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Chapter 2. Learning the basics
Mute button ( )
Mute/Unmute
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.
• In Windows operating system, press this button to start Lenovo OneKey
Recovery.
Note: For details, see “OneKey Rescue System” on page 41.