Managing the Registry . Enum Contains the complete
Managing the Registry . Enum Contains the complete enumeration of devices found on the system when Ntdetect.com scans the system buses and searches for specific classes of devices. This represents the complete list of devices present at boot time. . Hardware Profiles Contains a subkey for each hardware profile available on the system. The first hardware profile, 0000, is an empty profile. The other numbered profiles, beginning with 0001, represent profiles that are available for use on the system. The profile named Current always points to the profile selected at boot time. . Services Contains a subkey for each service installed on the system. These subkeys store the necessary configuration information for their related services, which can include startup parameters as well as security and performance settings. Another interesting subkey is HKLMSYSTEMMountedDevices. This key is created by the Logical Volume Manager service and is used to store the list of mounted and available disk devices. Disk devices are listed according to logical volume configuration and drive letter designator. HKEY_USERS HKEY_USERS, abbreviated as HKU, contains user profile data for every user who has previously logged on to the computer locally, as well as a default user profile. Each user s profile is owned by that user unless you change permissions or move profiles. Profile settings include the user s desktop configuration, environment variables, folder options, menu options, printers, and network connections. User profiles are saved in subkeys of HKEY_USERS according to their security identifiers (SIDs). There is also a SecurityID_Classes subkey that represents file associations that are specific to a particular user. For example, if a user sets Adobe Photoshop as the default program for .jpeg and .jpg files and this is different from the system default, there are entries within this subkey that show this association. When you use Group Policy as discussed in Part 7, the policy settings are applied to the individual user profiles stored in this key. The default profile specifies how the machine behaves when no one is logged on and is also used as the base profile for new users who log on to the computer. For example, if you wanted to ensure that the computer used a password-protected screen saver when no one was logged on, you would modify the default profile accordingly. The subkey for the default user profile is easy to pick out because it is named HKEY_USERS.DEFAULT. Chapter 14 Note The profile information stored in HKU is loaded from the profile data stored on disk. The default location for profiles is %SystemDrive%Documents and SettingsUserName, where UserName is the user s pre Windows 2000 logon name. Part 4: Managing Windows Server 2003 Systems
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