Whenever I plug my 2nd gen. iPod nano (2GB,silver) into my dell pc, it says: "One of the USB devices attached to this computer has malfunctioned, and Windows does not recognize it." But whenever I plug it into my sister's PC, Windows and iTunes recognize it just fine. I even restored my iPod on her PC, then plugged it back into my PC, and it STILL gave me that stupid message! I even tried using different USB ports and cables, and I STILL get that message. Is there something wrong with my PC, cuz I don't think my iPod is the problem? What do I do???