If your Windows session doesn??™t survive a Sleep, you might not have the
hybrid sleep feature enabled. Open the Power Options page in Control
Panel, click the Change plan settings link under the currently selected plan,
and then click the Change advanced power settings link. If necessary, click
the Change settings that are currently unavailable link. Expand the Sleep
branch, set the Allow hybrid sleep option to On, and click OK.
Conversely, if you??™d prefer the quickest possible startup and shutdown, and
you??™re willing to give up the benefits of hibernation, set the Allow hybrid
sleep option to Off. This effectively gives Vista a Standby feature; just don??™t
be surprised when Windows can??™t resume your previous session because
your PC lost power while it was asleep.
Hibernate, for real this time
If you??™re not happy with Vista??™s Sleep mode, you can instead use the true
Hibernate feature that??™s hidden by default in Windows Vista.
Open a Command Prompt window in administrator mode: open the Start
menu, type command in the Search box, right-click the Command Prompt
icon that appears, and select Run as administrator. Then, type:
powercfg /hibernate on
at the prompt and press Enter. If the command returns you to the prompt
with no message, the change was successful, and you can type exit or close
the Command Prompt window. The change takes effect right away (see the
???What is hiberfil.sys???? sidebar, next, for evidence), but you??™ll need to close
and reopen any Power Options windows (next) to see the new options.
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