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Hibernate mode works in a way that is a bit different from standby mode. When a computer enters standby mode, Windows XP turns off most of the devices in the computer (including the display, hard disks, and peripherals), but keeps just enough power flowing to keep the information in memory intact—information that includes open windows and running programs. When you exit standby mode (typically by moving the mouse or pressing a key), Windows is returned to the state in which you left it. However, when a computer is in standby mode, it is still reliant on a power source. If the power source is interrupted (for example, if the battery runs out), information in memory is lost.
When your computer enters hibernate mode, Windows saves the information in memory (including open programs and windows) to your hard disk, and then your computer shuts down. When you start the computer after it has been hibernating, Windows returns to its previous state. Restarting to the previous state includes automatically restarting any programs that were running when it went into hibernate mode, and it even restores any network connections that were active at the time. The advantage of hibernation mode over standby mode is that when a computer is in hibernation mode, it is not reliant on a power source—the computer is completely shut down.
To configure your computer to use hibernate mode, use the Power Options Properties dialog box. Click the Hibernate tab and select the Enable Hibernation check box. If the Hibernate tab is unavailable, your computer does not support this mode. Hibernation works by saving the information currently stored in your computer’s memory to hard disk. To do this, Windows creates a hibernation file on the root of your system partition. This file changes size, depending on the amount of memory you have, but always consumes the amount of space it will need—even if you have never hibernated. Unless you plan to use hibernation, you should disable this option to save disk space.
Configuring Power Options
1. Ensure that you are logged on with a user account that is a member of the Administrators group.
2. Click Start, click Control Panel, and then click Performance And Maintenance.
3. Click Power Options. Windows XP Professional displays the Power Options Properties dialog box with the Power Schemes tab active.
4. In the Power Schemes list, select Portable/Laptop.
5. In the Turn Off Monitor box, select After 10 Mins.
6. In the Turn Off Hard Disks box, select After 20 Mins.
7. Click Save As, and then in the Save Scheme text box, type Emdadblog.
8. Click OK.
You have just created a new power scheme. If you click the arrow at the end of the Power Scheme box, Emdadblog is now included in the list of available power schemes. If you want to use this power scheme, click Apply.
9. Click the Advanced tab and select the Always Show Icon On The Taskbar check box.
10. Click the Hibernate tab.
11. If the Enable Hibernation check box is not selected, select it, and then click Apply.
16. Close all open windows.