The original post is from OnlineTechTips. Credit for them.
Is your Windows keep popping-out the "USB device not recognized" one day when you plugged in your thumb drive or whatever USB device? Even tried to repair registry, repair driver, reformat and the problem still persists? Suspecting the motherboard USB ports had spoilt? Take it easy, there is still something for you to try before you pulling all you hair out and bang your head to the wall. Here I quote the whole article from OnlineTechTips:
Are you getting a “USB device not recognized” error whenever you plug in a USB mouse, keyboard, or other USB device? I love USB and have 5 ports on my computer so that I can connect my mouse, keyboard, camera, phone, and printer to it all at once!
However, last weekend, my computer stopped recognizing my USB devices! The strange thing about it was that the USB ports were not bad because all of my devices were still getting power to them. I could still charge my cell phone without a problem!