Can't install drivers at all on my pc

Hello all,

recently I bought a new ipod. when I plugged it in it did not work because the driver couldn't be installed.
Later on I tried to plug in a hard disk but again the driver couldn't be installed.

it seems that the pc can't install any drivers at all !!

I updated the Microsoft windows updates and ran the Troubleshooter several Times but still noting happens.

pleas help my!! thanks!

(I heve windows 7 64 bit)
 
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