OS: Windows 7 x64 Ultimate (legit and fully updated) Motherboard: ASUSTeK M3N78 Pro Bios Rev: 1402 CPU: AMD Phenom II X4 965 GPU: Nvidia GeForce 9800GT 1GB RAM: Corsair CM2X2048-6400C5 DDR2-800 x4 (matching pairs) This issue has been going on for some time now, my wife's computer. Randomly and without warning, it will throw bluescreens or hard freeze. I have ran all the mem tests, drive tests, error checks. I have reseated all hardware and peripherals, including the processor. I have checked the voltages, drivers, and heat. I have taken out all but one stick of ram and removed all hardware except the necessary items. I have replaced SATA cables, moved drives around. I can not for the life of me figure this one out....seems to be the only PC I've ever NOT been able to fix. I would post the BSOD's, but I am on a seperate computer. I can say that they usually refer to the nvsmu, which is also the latest version. Any suggestions or help would be greatly appreciated. *EDIT: The drives are also slow to react, as per the title of the thread here. This happens sporadically and does not always dictate whether or not the system will freeze or crash.