I have several hard drives that I swap in and out of my laptop. Two of the drives have Windows 7 Home Edition. The laptop is a i3 core 2.4Ghz, 6 gig of ram. I've done the usual disk cleanup, defrag, removing unwanted programs, scannow/sfc, there is no malware or any virus in the drives. Both drives are 3.0Gb/S 5400Rpm 8M. One drive outperforms the other in certain programs. What I have found that I could visually see is that, for instance, in a solitaire game, when turning cards or moving them around it seems that it doesn't buffer my key strokes. I thought this might be a video problem but the video drivers are the same drivers on both hard drives. Any body have this problem before?