Managing User and Group Accounts | 71
On portable computers, there are other options in the Advanced tab. You can
configure settings for the Power button, opening or closing the portable display
(lid), and the Sleep button.
Advanced Power Management (APM).
The Advanced Power Management (APM) tab is
available in the Power Options utility on only those computers that are not
compatible with the Advanced Power Configuration Interface (APCI). If your
computer has an APCI-compliant BIOS, Windows XP automatically enables
Advanced Power Management and disables the APM tab. Otherwise, you can
enable APM support from the APM tab by clicking the Enable APM Support
There are several power options included in Windows XP Profes-
sional. Most of these options are useful only when you are working
on a portable/laptop computer. If you don’t have access to a porta-
ble computer, you should explore all the options in this utility to
get good grip on available configuration options.
In the Stand By mode, Windows XP Professional turns off power to
the monitor, the hard disk, and most of the peripherals. When you move the
mouse or press a key on the keyboard, the system returns to normal. Hibernate
mode differs from Stand By mode in that the operating system saves the informa-
tion currently in the memory to the hard disk and then shuts down the system.
When you turn on the system again from Hibernate mode, you are returned to the
state where you left the system idle. Any programs and applications that were
running when the system went into Hibernate mode are restarted.
To configure the Hibernate settings of your computer, open the Power Options
utility from the Control Panel and click the Hibernate tab. Click the Enable Hiber-
nate Mode checkbox. The main advantage of Hibernate mode over Stand By
mode is that the computer is not dependent on any power source because Hiber-
nate mode completely shuts down the system.
Uninterruptible Power Supply (UPS).
The Uninterruptible Power Supply (UPS) protects
the computer from sudden power outages, power surges, and brown outs, as well
as helps save your currently open and unsaved documents when the system’s
power supply fails. The UPS tab in the Power Options utility opens the UPS
Configuration dialog box, where you can configure various settings such as notifi-
cations, critical alarm, and whether you want to shut down the system and the
UPS. Some UPS systems come with their own software, and you should always
make sure that the UPS system you are buying is compatible with Windows XP
Managing User and Group Accounts
User accounts allow a person to log on to the local computer or to the domain and
access local or network resources. Access to resources is normally managed using
groups of users or Groups. Windows XP Professional supports two types of user