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Before You Begin
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To complete this chapter, you must have a computer that meets the minimum hardware requirements listed in the preface, About This Book. You must also have Microsoft Windows XP Professional installed on a computer on which you can make changes.
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Using Windows XP Tools
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Lesson 1: Working with Services
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Services are programs or processes that start with Windows XP Professional and run in the background, providing necessary functions to other programs and operating system components. Services start prior to user logon, so a service can begin providing its functions without a user having to log on. Some services depend on other services, meaning that the other services must be running first for the dependent service to run. Windows XP Professional uses these dependencies to determine the order in which it starts services. You can disable services temporarily or even prevent services from running when Windows starts up by using the System Configuration Utility and the Services console.
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After this lesson, you will be able to
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Manage services by using the Services console. Disable and enable services by using the System Configuration Utility.
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Estimated lesson time: 40 minutes
How to Manage Services by Using the Services Console
The Services console is the primary method for managing services on a computer running Windows XP Professional. You can access the Services console in the following ways:
Open the Administrative Tools folder (from Control Panel) and double-click Services. Open the Computer Management window, expand the Services And Applications node, and then click Services. Create a custom Microsoft Management Console (MMC) console and add the Services console.
No matter which way you open the Services console, shown in Figure 18-1, the interface is the same. In the right pane, you will see a long list of the available services along with a description, the current status of the service (Stopped or Started), the Startup Type (Automatic, Manual, or Disabled), and how the service logs on to the computer. When you select a service (such as the DNS Client service selected in Figure 18-1), you are shown a detailed description that tells you what the service does. Some of these descriptions also tell you what happens if you stop or disable the service.
Lesson 1
Working with Services
18-3
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Figure 18-1 fessional.
The Services console is the primary method for managing services in Windows XP Pro-
How to Stop, Start, Pause, Resume, and Restart a Service
After selecting a service in the Services console, you can control the service in the following ways: Stop a service When you stop a service, the service becomes unavailable. The service does not restart until you start the service again or until the next time Windows starts up (if the service is configured to start automatically during startup). The Services console does not let you stop a service on which other services depend. You must stop services in the correct order of dependency. To stop a service, click the service, and then click the Stop button (or right-click the service, and then click Stop). Start a service You can start a service that you have stopped or a service that is enabled, but for which the startup type is set to Manual. To start a service, click the service, and then click the Start button (or right-click the service, and then click Start). Pause a service Only some services can be paused. When you pause a service, the service refuses any new connections but does not disconnect existing connections to the service. An example of such a service is the World Wide Web Publishing service, which is the component of Internet Information Services (IIS) that allows users to connect to a Web site hosted on the local computer. When you pause this service, IIS no longer allows users to connect to any local Web sites, but it does not disconnect existing users from the Web site. Pausing a service allows you to shut down a service gracefully, without interrupting users or other services. After the users or services that are using a service stop using it, you can then stop the
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