My keyboard last night decided to stop working. And error message only came up once but all I can remember from it was "The last usb you plugged in was malfunctioned'. I've searched up for quite a while on how to fix it and I came across the device manager. I've been searching throughout the device manager for the past 20 mins now and I cannot find the USB of the keyboard. My keyboard is E-3LUE Polygon Game Keyboard. I have also searched the name of the keyboard up and if anyone has any problems but it seems I can't find any. I have also tried to plug it into the same USB port as usual but it still didn't work.