test all power and data leads that attach to your hard drive the leads from your
(motherboard to your hard drive) Sata make sure they have dust free secure connections and are not faulty or just replace them they could be faulty make sure all leads that are attached to your drives dvd\cd have secure connections and are not faulty
even something as small as a faulty fan lead can cause you problems a computer needs all of the power and data to travel through every working device and to
have an end for a computer to be able work properly
make sure your graphics card is securely seated with no dust
if you remove the graphics card to clean the socket replace it
restart the computer the found new hardware wizard should activate
hope this helps
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