I am really really sick with my dell inspiron 5160 with its noisy fans almost always turned on . The fans start kickin even if the cpu temp is 35c-50c range. Generally, when I am using the laptop, the cpu temp is around 55c. I am thinking of changing the fan setting manually so that it won't start until the cpu temp is 60c. Is this a bad idea? Upto what cpu temp its safe to use the laptop without turning on the fans ?