Always whenever I go on to do a multiple task onto my windows 7 machine the system lags and becomes too slow without any reason. Mostly it happens when I am performing task like coping data to another hard drive, accessing internet, browsing something, playing game and so on. The computer becomes so slow that I can actually see the process in frames which moves on each and every second. To be frank I seriously do not have any idea what exactly is causing the problem but i feel that it is my Seagate St3000dm001-9yn166 the main cause of the problem as I have recently installed this hard drive into my windows 7 64 bit computer machine. Before installing this HDD everything was fine and working well. Anyone have any idea about this issue. just let me know at least is the main reason for such lagging issue.