Hard drive is not recognize by the computer

You are having problem with the USB driver there is no problem in the Hard disk.

update the USB drivers and your disk will be fine.

I found the solution to my problem that looks just exactly like this. My external hard drive stopped working and my computer said it was an "Unknown Device". I tried it on the other computer and it worked. That computer hadn't undergone a recent "update". Bloody hell...


But anyway, that one stopped working with it as well. Can you guess what happened?

Then I tried it on the Vista laptop. But before it could screw up, as well, I researched the driver for the drive. It was USBSTOR.SYS.

I copied it to the desktop, sent it to myself with email, and put it in the system32/drivers folder, and now my drive works on all my computers.

You generally shouldn't need a driver for these things, but that's essentially a lie. There should already BE a driver on most XP computers. But if it's not there? You're kinda screwed. I am trying to figure out how to host this one and link it, but in the meantime, just google USBSTOR.SYS

There are a few links to downloads out there.