Problem in fps

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Please update after the last fps became very weak P could be up to 6 and 7 and was up to 40 by 50 and i change the windows more than once and I did formate for the computer, but the problem has not changed, please I want a solution Thanks
Device Information
processor: intel(r) core(tm)2 duo cpu t7250 @ 2.00ghz 2.00ghz
ram : 2.00gb