click start control panel administrive tools ,computer management ,device manager look through all of your devices if you see a yellow question mark?or exclamation mark ! or red x
right click to reinstall drivers or
if you can see your usb but its not working
ports(com&lpt)right click update driver
sometimes the wires inside the cable will be damaged due to bending or stretching or placing heavy equipment upon the cable,
just replace the cable of the hard disk, when you plugged the external disk drive you got that windows could recognize the USB device change the cable everything should work fine again,
check the USB leads that attach to the motherboard usually red-white-green-black make sure they are securely seated and have no dust build up on them dust will cause static and a lot of unforeseen problems also make sure the computers Ram and Cmos battery are securely seatedif this fails to fix the problem
you might have to install a usb 2 or 3 card they are cheap and easy to install you can buy these on Ebay very cheap if this solution does not work and you might need one http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=280406610810&ssPageName=STRK:MEWNX:IT$1+$2.46 postage worldwide You might get these on Ebay im not sure which country you are in this might guide you to oneyou could get this on Ebay if you dont have an account you will need to create oneAdd Email adress Add Bank AccAdd Credit Cardalso add your postal adressalso add a paypal accountwhen you get to the paypal login page at the bottom you will see new to paypal sign up tab paypal to create an accountpaypal registration password ,bank card /credit card phone numbers home/mobile ,email adress and a postal adressbe very specific when you type in the search always ask questions? before you make a purchase and keep the email/s for security reasons if the item arrives and its not as describedyou will even see the pictures of your item so you cant make a mistake and get them home deliveredhope this helps
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