Have a customer that has a Win 7 pc. He started having issues with a USB printer which ultimately led to the dreaded "your USB device has malfunctioned" error. I've tried all the answers i could find such as system restore, a different USB cable, altering Registry settings, turning the pc off and unplugging the power supply and waiting, etc. Nothing has resolved it. It appears to be happening for any USB device except a keyboard and mouse. They are fine. I have also tried plugging into both the rear and front USB ports with the same outcome. Need help.