I have an external HD (old MacBook HD in enclosure), and I was using it on a PC earlier. The PC came up with a message in the bottom right saying something about a power surge to the HD, and that it couldn't be recognised. Since then, every time I plug the HD into a PC, it grinds and squeaks, and isn't recognised at all, yet when I plug it into my MacBook, everything works fine. What does this mean? Is my enclosure faulty? Or has it now got a Windows allergy? Thanks!