I have a very strange problem with my USB and it seemed to start suddenly, I cant pinpoint the cause. None of my USB slots work, when all of the slots are empty I get an error message in windows saying "Error USB device not recognised", a device which isnt in there cant be recognised, i dont understand. These are all onboard USB slots. I put in extra USB slots on a panel that came with the mmotherboard which connect directly into the board, and they dont work either. So not only are my onboard USB slots not working, the NEW USB that i only just put in doesnt want to work either, so it doesnt sound like the USB slots themselves are faulty, but maybe something else on the mobo thats connecting them. I have formatted my computer twice and I still get this error, and i have never had it in the past, so i cant see it being a driver error. Does anyone know what is going on? any help is appreciated. Thanks.