Power management

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Power management

Your computer features a built-in power management unit that 
constantly monitors system activity. System activity refers to any 
activity involving one or more of the following devices: keyboard, 
touchpad/mouse, hard disk drive, optical drive, peripherals connected 
to the computer, and video memory. If no activity is detected for a 
period of time (the settings are controlled in Windows Power 
Management), the computer turns off some, or all, of these devices in 
order to conserve power.
Your computer employs a power management scheme that supports 
Advanced Configuration and Power Interface (ACPI), enabling 
maximum power conservation without compromising system 
performance. ACPI allows Windows to control the amount of power 
given to each device attached to the computer. In this way, Windows 
handles all power-saving chores for your computer. Refer to Windows 
Help and Support for more information.