The device manager is in charge of updating the drivers of the devices installed on your PC and modifying the hardware configuration, thus solving the problems that may arise. It identifies the components assigning them their corresponding drivers and the resources necessary. Nevertheless, on many occasions it is incapable of finding the drivers so that something works properly.
Thanks to Unknown Device Identifier you won't only be able to totally control all the computer's components, but also search for the drivers necessary for their proper functioning on Google. A great tool with which you can optimize how your operating system works.