Plug it into the rear USB ports. Sorry if this doesn't help, the details are too slim in your post. That install of Windows might be a clue but there again I can't tell if you have the needed SP2 and all drivers.
i have a SimpleTech external hard drive .. 250 gb .. but the problem is that everytime i plug it into my pc it keeps saying that the device in the usb malfunctioned .. but when i try to plug it in any other computer it works fine !! the usb ports are working fine i tried pluggin in printers and mobiles and it all worked .. i tried to uninstall my windows and install a new one but i still have the same problem .. plz someone help me