click start control panel administration 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
if 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
hope this helps you
Fist clean your computer of dust using a fine air blower from a compressor specifically around your central processing unit making sure there is no moisture in the air line
as dust will cause a lot of static which will make a computer overheat and cause lots of problems
then test your power supply unit PSU
reple all the leads that attach to your hard drive including electrical extensions + IDE,SATA and the ones that attach from your motherboard to hard drive one bad lead will cause a computer to shut down
make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty or just replace them they are probably old and faulty ?
then click start?run type?cmd then type?chkdsk/f which will automatically fix any corrupt files on your hard drive then defragment your hard drive
you have to keep?a computer very clean & free of dust ?and? give it regular?maintanance
?
good luck with this
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