I have a Freecom Classic SL 320 GB external hard drive, which was working fine up until today. I am running Vista, drive attached by USB with seperate power source. Yesterday i transferred the father in laws old XP contents to his new shiny windows7 laptop using my hard drive. Today it now doesn't work back on my laptop. i get a message - " USB doesn't recognise this device" I've tried the old on/off switch and looked for new drivers on line but so far no success. Any suggestions?