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Powering down the computer
❖
No power is used while the computer is turned off. This
is the most efficient mode if you will be away from your
computer for an extended time.
❖
Restarting from Turn Off or Shut down uses the most
time and battery power.
❖
When starting up again, the system does not
automatically open the programs and files you were
previously using.
Restart command
Restart is the same as Turn Off or Shut down but
automatically powers up the computer. Use it when you need
to reload the operating system, for example to activate
changes to system settings.
Hibernation command
The Hibernation command shuts the computer down
completely, but it first saves the current state of the computer
to the hard disk. Since Hibernation mode does not require
power to maintain the saved information, the system settings
are retained indefinitely. Restoring information from the hard
disk takes longer than restoring it from memory. When you
start up again, the computer runs a self-test, loads the
operating system, and then returns to the state in which you
left it.
Factors when choosing Hibernation mode:
❖
While in Hibernation mode, the computer uses no battery
power.
❖
Because the state of the system is held on the hard disk,
no data is lost if the battery discharges.
❖
Restarting from Hibernation mode uses less time and
battery power than restarting from Turn Off.
❖
Restarting from Hibernation mode uses a little more time
and battery power than restarting from Stand by because
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