PCI device problem

I replaced my cpu, and ram, and my computer boots up fine, but it keeps saying new hardware found, and brings up the install wizard for PCI device. When I check my hardware, under device manager, all PCI devices have a ? beside them, and none of my USB ports will work. Any suggestions?
 
This is because the drivers for those hardware are not installed or a problem with the drivers. Try running Windows Update as Rabbit01 mentioned or if you have the drivers on a CD install them.
 
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