Managing the Registry HKLMHARDWARE HKLMHARDWARE stores information about (Web site builder)
Managing the Registry HKLMHARDWARE HKLMHARDWARE stores information about the hardware configuration for the computer. This key is re-created by Ntdetect.com each time you start Windows Server 2003, and it exists only in memory, not on disk. To build this key, Ntdetect.com enumerates every device it can find by scanning the system buses and by searching for specific classes of devices, such as serial ports, keyboards, and pointer devices. Under HKLMHARDWARE, you ll find four standard subkeys that are dynamically created at startup and contain the information gathered by Ntdetect.com. These subkeys are as follows: . ACPI Contains information about the Advanced Configuration Power Interface (ACPI), which is a part of system BIOS that supports Plug and Play and advanced power management. This subkey doesn t exist on non-ACPI-compliant computers. . DESCRIPTION Contains hardware descriptions including those for the system s central processor, floating-point processor, and multifunction adapters. For portable computers, one of the multifunction devices lists information about the docking state. For any computer with multipurpose chip sets, one of the multifunction devices lists information about the controllers for disks, keyboards, parallel ports, serial ports, and pointer devices. There s also a catchall category for other controllers, such as when a computer has a PC Card controller. . DEVICEMAP Contains information that maps devices to device drivers. You ll find device mappings for keyboards, pointer devices, parallel ports, Small Computer System Interface (SCSI) ports, serial ports, and video devices. Of particular note is that within the VIDEO subkey is a value entry for the Video Graphics Adapter (VGA) compatible video device installed on the computer. This device is used when the computer must start in VGA display mode. . RESOURCEMAP Contains mappings for the hardware abstraction layer (HAL), for the Plug and Play manager, and for available system resources. Of particular note is the Plug and Play manager. It uses this subkey to record information about devices it knows how to handle. Additional nonstandard subkeys can exist under HKLMHARDWARE. The subkeys are specific to the hardware used by the computer. HKLMSAM HKLMSAM stores the Security Accounts Manager (SAM) database. When you create local users and groups on member servers and workstations, the accounts are stored in HKLM SAM as they were in Windows NT. This key is also used to store information about built-in user and group accounts, as well as group membership and aliases for accounts. Chapter 14 417 Part 4: Managing Windows Server 2003 Systems
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