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It s difficult to find all the information you need about a workstation or server in one place. However, when troubleshooting and managing machines on your network, you must know what you re dealing with. In Windows NT 4, a good first place to look is the Windows NT Diagnostics utility, which can be run using the shortcut in the Administrative Tools program group. Figure 3-7 shows the types of information you can easily view. Windows NT Diagnostics also allows you to view information about remote machines. To do this, choose File | Select Computer. Note that you won t be able to access all
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of the same information, but if you re wondering about general configuration of a machine, Windows NT Diagnostics is a quick way to get what you need.
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In certain situations, you ll have little control over the circumstances that lead to data loss. However, in other cases such as preventing mistakes made by users there are steps you can take to ward off trouble. We have already talked about the benefits of restricting network functions on the server side. Now let s look at it from the client s point of view. The potential problem is the same: the Windows NT OS offers a lot of power, but most users don t need it all. Fortunately, there s a way to lock down certain functions and thus prevent users from inadvertently making errors. In general, planning for and implementing Windows NT system policies can take considerable time. Additionally, political issues often are involved in the decisions made. In some cases, the costs of unauthorized users accessing information may be as little as an employee playing unauthorized games on the network. However, it could be much more
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serious a malicious employee could obtain confidential information, such as salary records. System policies are especially useful in preventing accidental problems that occur when users inadvertently change system setting, or delete files to which they should not have access. Taking the time to restrict the actions a user can perform is a great way to avoid problems in the future and can significantly protect your total cost of ownership. System policies are based on Windows 9x/NT Registry settings and restrict the functions that users can perform on specific machines. Although all of these changes can be made with the Registry Editor tool, it is often very difficult, among the thousands of keys available, to find the keys that you wish to modify. Furthermore, having to make these changes on individual systems in your environment is not practical. The System Policy Editor tool included with Windows NT was created to make this process easier and more manageable. In this section, we ll see how you can create policies based on templates and then assign them to user accounts.
The Windows Registry
Windows 9x and Windows NT computers store information in a single location called the Registry. These files contain information on hardware devices and drivers, applicationspecific settings, and user settings. The Registry itself consists of files that serve as a central repository of this data. Table 3-2 lists the default Registry filenames and tells you where they re located. The OS automatically makes modifications to the Registry whenever user or system changes are made. This might include changing service startup options or installing new programs.
NOTE: As a safety precaution, the Registry files have the Hidden attribute enabled. To see them from within the file system, you need to make sure that you re viewing hidden files. In DOS, you can use the dir /a command, and in Windows Explorer, you can select View | Options.
For editing the Registry, Windows 9x/NT users can use the RegEdit program. This tool provides an Explorer-style interface; to use it, select Start | Run, and then type RegEdit or RegEdt32. Windows NT supports RegEdit and also includes the RegEdt32 program (shown in Figure 3-8) that enables you to set security on Registry keys. You cannot use this utility, however, to view or modify remote Windows 9x Registry settings.
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