Hello everyone. I have recently bought Asus N53SM laptop with windows 7 Ultimate OS. It runs very smooth and fast, but 3 days ago I experienced huge lag (nothing worked except the mouse), which forced me to shut down my laptop by pushing the power button. In addition, sometimes my task manager crashes. So now I del with this problem every day and it really bothers me that I am not able to experience my i7 and 4.00 GB of RAM in full speed.
Could you please suggest something or at least give some possible speculations on what I could have done wrong or might not have installed?

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