I have a Dell Dimension running Win XP Pro SP2. It will no longer recognize any USB Mass Storage Devices. I have an MP3 Player, a thum drive, and an external HD, and they all get the same error no matter what USB Connection I plug them into. "USB Device not Recognized". Other USB Devices are working well (Printer, mouse etc).
I've uninstalled all the USB controllers and allowed them to reinstall on a reboot. I tried reinstalling the chipset drivers. Both of these had no effect. Any ideas?