Microsoft KB Archive/310592

= Description of the Subkeys Contained in the HKEY_LOCAL_MACHINE\Enum Registry Key =

Article ID: 310592

Article Last Modified on 12/1/2007

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APPLIES TO


 * Microsoft Windows XP Home Edition
 * Microsoft Windows XP Professional
 * Microsoft Windows XP Professional x64 Edition

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This article was previously published under Q310592





SUMMARY
This article describes the subkeys contained in the HKEY_LOCAL_MACHINE\Enum registry key in Windows.



MORE INFORMATION
The HKEY_LOCAL_MACHINE\Enum key contains subkeys for the specific hardware components your computer uses. Windows uses this information to allocate resources (for example, IO addresses and interrupts for the devices). All values in the Enum subkey are manufacturer-specific and device-specific, so specific information can vary from computer to computer.

BIOS
This subkey contains entries for Plug and Play components of the BIOS (this includes timers, controllers, and direct memory access [DMA] chips). Each BIOS subkey starts with the string *PNP and is followed by a four-digit number that represents classes by which the components are grouped, as shown in the following example:


 * PNP0000

Each *PNP key contains subkeys (00,01) that contain the data (for example, class name, device description string, driver name, and hardware ID) for the device configuration.

ESDI
This subkey contains the configuration data of the IDE-controller used for hard disks and other devices.

FLOP
This subkey contains the configuration data of the floppy disk controllers used in the computer.

HTREE
This subkey is reserved for future use in Windows.

ISAPNP
This subkey contains entries for Plug and Play equipment enumerated on an ISA bus.

MF
This subkey defines manufacturer-specific information about hardware components.

MONITOR
This subkey contains information about the monitor used in the computer. If Setup cannot detect the monitor type, the user sets the selection.

NETWORK
This subkey contains information about the network (for example, redirectors, services, and NetBEUI). The network adapter is specified in the Root\Net subkey.

PCI
This subkey contains entries for Plug and Play equipment on a Peripheral Component Interconnect (PCI) bus.

ROOT
This subkey contains *PNP entries for legacy, non-Plug and Play hardware (for example, the CPU, BIOS, network adapters, and printer drivers).

SCSI
This subkey contains information data for Small Computer System Interface (SCSI) devices.

USB
This subkey contains information data for Universal Serial Bus (USB) devices. USB support is not included in Windows 95.

NOTE: Depending on the computer, you may have have keys for infrared, tape controllers, and modems, if those devices are installed on the system.

Additional query words: registry regedit hardware enumeration pnp

Keywords: kbenv kbinfo KB310592

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