Appendix G. WMI Reference

The Windows Management Instrumentation (WMI) facilities in Windows offer thousands of classes that provide information of interest to administrators. Table G-1 lists the categories and subcategories covered by WMI and can be used to get a general idea of the scope of WMI classes. Table G-2 provides a selected subset of the most useful WMI classes. For more information about a category, search the official WMI documentation here.

Table G-1. WMI class categories and subcategories



Computer system hardware

Cooling device, input device, mass storage, motherboard, controller and port, networking device, power, printing, telephony, video, and monitor

Operating system

COM, desktop, drivers, filesystem, job objects, memory and page files, multimedia audio/visual, networking, operating system events, operating system settings, processes, registry, scheduler jobs, security, services, shares, Start menu, storage, users, Windows NT event log, Windows product activation

WMI Service Management

WMI configuration, WMI management


Installed applications, performance counter, security descriptor

Table G-2. Selected WMI classes




Represents a named collection of data or executable code. Currently, the provider returns files on fixed and mapped logical disks. In the future, only instances of files on local fixed disks will be returned.


Represents a baseboard, which is also known as a motherboard or system board.

Win32_BIOS ...

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