Sometimes Windows fails to identify the device installed or connected to the computer, and Windows cannot or unable to find proper or correct driver for the device.
When Windows fails to identify or recognize the device connected to the computer, or does not have the driver for the device, the device is unusable. In Device Manager, the device will be listed as unknown device with yellow question mark.
In order to fix and resolve a unknown device status which causes the device cannot be used or functioned is to download and install proper and correct device driver for the device from manufacturer’s or vendor’s support website. But in order to download or find the correct device driver, the device has to be correctly and accurately identify and recognize the type, name, make or brand of the device.
There is manual method to find and identify the brand or make name of the device with Vendor and Device ID but its a bit complicated, there are a few software utilities that helps to identify and find unknown devices’ drivers among them Unknown Device Identifier is my favorite