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Description An extensive list of known problems and solutions that you can search. If you are unfamiliar with searching the Microsoft Knowledge Base, see article 242450, How to Query the Microsoft Knowledge Base Using Keywords. To find this article and for more information about the Microsoft Knowledge Base, see the Microsoft Knowledge Base link on the Web Resources page at http://www.microsoft.com /windows/reskits/webresources. A Web site that contains technical information, useful links, downloads, and answers to frequently asked questions (FAQs). To access the support options available from Product Support Services, see the Microsoft Product Support Services link on the Web Resources page at http://www.microsoft.com/windows/reskits /webresources. A subscription-based service for IT professionals that enables you to search technical content and topics about Microsoft products. For more information about TechNet, see the Microsoft TechNet link on the Web Resources page at http://www.microsoft.com/windows /reskits/webresources. Many Web sites maintained by individuals and organizations provide troubleshooting information for Microsoft Windows 98, Microsoft Windows Me, Microsoft Windows NT version 4.0, Microsoft Windows 2000, Microsoft Windows Server 2003, and Windows XP Professional. Some of these Web sites specialize in hardware issues; others, in software. Files that contain the latest information about the software or driver installation media. Typical file names are Readme.txt or Readme1st.txt. Reference books such as the Microsoft Windows 2000 Server Resource Kit, the Microsoft Windows Server 2003 Deployment Kit, and the Microsoft Windows Server 2003 Resource Kit provide helpful information for diagnosing problems. Technical support can help you solve a complex problem that might otherwise require substantial research time. Instructor-led or self-paced training can increase your troubleshooting efficiency. A site that contains downloadable content, including current information about improving system compatibility and stability. For more information about Windows Update, see the Windows Update link on the Web Resources page at http://www.microsoft.com /windows/reskits/webresources.

Part V:

Before you apply a solution or workaround, or test an upgraded or updated application, use Backup to back up your system. Backups allow you to restore the computer to the previous state if you are not satisfied with the results. For information about backing up your system, see 14, Backing Up and Restoring Data. If your organization has test labs to use, consider testing workarounds and updates in a lab environment before applying them to multiple systems. For more information about software compatibility testing, see Avoid Common Pitfalls later in this chapter.

ICF is easy to configure and use as long as you remember two simple rules:

Review the history of your computer to know about recent changes, including all hardware and software installed. If baseline or change records exist, look for information about new devices, new applications, updated drivers, and change dates as well as descriptions of the work done. If records are not available, you can learn much about your computer by querying users and internal support personnel or by using tools such as Device Manager and System Information. For more information about Device Manager and System Information, see Windows XP Professional Help and Support Center and Appendix C, Tools for Troubleshooting. Also, see 9, Managing Devices. Here are a few points to consider when reviewing the history of your computer:

Microsoft technical support might provide a software update for an urgent or critical issue. Software updates address a specific issue and might not be fully tested for compatibility. For example, a software update that works for one computer might cause unwanted results in another. Carefully read and follow the instructions before applying a software update.

Was a software update applied Did the problem occur soon after new hardware was installed Why were hardware or software updates made Are the motherboard and peripheral firmware current Can you establish a relationship between the problem and the recent change Are any non Plug and Play devices installed If so, you can check for proper configuration by using hardware diagnostic programs and Device Manager. Try replacing non Plug and Play devices with hardware that is compatible with Windows XP Professional. For more information about selecting hardware, see Avoid Common Pitfalls later in this chapter. Was a new user recently assigned to the computer If so, review system history to determine whether the user has installed incompatible hardware or software.

has a broadband connection to the Internet as well as a dial-up connection to the Internet, both the broadband connection and the dial-up connection should be firewalled for complete protection. Failure to turn on ICF for one of the Internet connections is considered a security breach because your computer or network will not be protected whenever that connection is used.

27:

We have only three tables in our example, but you can imagine that constraints without names that exist between numerous tables would quickly become unclear Another foreign key constraint is the one between the OrderHeader and OrderDetail tables; this constraint prevents an order from being deleted before all of its matching order details have been deleted You can see in Figure 8-1 that the OrderHeader table has a second foreign key called CustomerID Therefore, another foreign key constraint is between the Customer and OrderHeader tables Following the same principles found with other foreign key constraints, this prevents a customer in the Customer table from being deleted before all the matching orders in the OrderHeader table and all the detail rows in the OrderDetail table that match the orders have been deleted If there were no foreign key constraints in this database, data integrity would be easily violated.