I have had this problem with a Hitachi 1tb Ext HD for over a year - it comes and goes. Did the fix, uninstall and it found it when plugged in again, but it just gave me an error tone and the drive once again is missing. My personal
opinion, Windows 7 Professional 64 bit has major problems regarding this USB external hard drive issue and Microsoft does not even acknowledge there is a problem. The only thing they want is for you to join their Premium Support Group at the tune
of $99.00 and they will guarantee a fix. As I am typing this, the system just found the external hard drive again and it now appears under My Computer. Can someone come up with a permanent fix on this "disappearing disk" act?
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