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In order to install these devices, the setup works along with other components both system-supplied and vendor-supplied. The devices are installed by setup once the system boots and when a user adds a Plug and Play device or manually installs a non-plug and play device. We will talk about plug and play devices in the coming lessons.
Setup ascertains the devices available in the computer, loads them and then calls the drivers for each device. Drivers such as the ACPI driver and other plug and play bus drivers assist setup to determine the devices that are present on the computer.
Now let's have a look at the device installation setup components for windows 2000 and later operating system.
This installation is divided into two parts - kernel mode and user mode (as shown in the adjacent figure).
Roles of various components, in device installation are described in the later sections that follow.
