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HKLM\SYSTEM\CurrentControlSet\Control Registry Tree

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The HKLM\SYSTEM\CurrentControlSet\Control registry tree contains information for controlling system startup and some aspects of device configuration. The following subkeys are of particular interest:

Class

Contains information about the device setup classes on the system. There's a subkey for each class that is named using the GUID of the setup class. Each subkey contains information about a setup class. Subkey information might include the class installer, registered class upper-filter drivers, and registered class lower-filter drivers.

CoDeviceInstallers

Contains information about the class specific coinstallers that are registered on the system.

DeviceClasses

Contains information about the device interfaces on the system. There's a subkey for each device interface class.