How to query Windows unknown devices and hardware IDs

Unknown devices caused by a variety of reasons, such as power management driver is not installed, and so on, you can use the hardware ID of unknown devices to simply determine the unknown device, power management hardware ID is generally VPC2004, the following figure is looking for hardware ID of the diagram, see:

Right-click on the computer, open management;

Click Device Manager to---Details of the device's right key attribute---Hardware ID (XP is the device instance ID)

The related hardware is queried through the Ven and dev code.