Hi. I have been using the COMMANDER Gaming Gear Combo keyboard and mouse for a couple of months now and have been very happy with them. However, the keyboard stopped working today. When I plug it into the computer it says USB device not recognized and under device manager it is labeled as Unknown USB Device (Device Descriptor Request Failed). I have tried using the keyboard with a few different computers just to make sure that it wasn't a problem with the computer. Not sure what I should do. Help would be greatly appreciated. Thanks!