Bought a new external HDD but my computer won't recognise it. The lights are on but no-one's home, so to speak. I've tried unplugging it and plugging it in again. Tried restarting it with drive attached. Tried it with the supplied 2-headed-USB lead and with a different lead, in several different USB ports - back, front, hub, powered hub. The best result I got was that once the computer tried to load the drivers for the device and then said the device was not recognised and got the "try again or replace the device" message. It doesn't show up at all in the device manager, so I can't even update the drivers to make it work.
This computer has done this before with a couple of other devices -most recently with a hard drive that used to work on this machine until the power supply for it burnt out, but then I had to do a fresh reload of Windows and suddenly the HDD won't show up even with a new power supply.
Usually it's a case of finding drivers or firmware or windows updates that fixes it, but since I bought this from ebay without packaging and don't even know what model the HDD is, I'm going to have trouble finding the right program for this one. The HDD did work for a few minutes on my Windows 7 laptop, so the HDD should be functioning (though it then decided to reject it from that computer, too, so maybe driver issues there, as well?)