This may be a not so smart question but here goes. Up until a couple of weeks ago my computer has been running fine and now the thing locks up frequently. I have replaced a few things to no avail so I was wondering if my cpu being way too hot would cause the lockups. Intel states the highest temp. should not exceed 43c under extremem conditions but the cpu stays around 66-70c. Would I just need to install another heatsink and thermal paste or is there any other suggestions.