notebook overheat may due to some reasons;
1. poor ventilation, notebook shall place on at hard flat surface. not on soft or clothed surface such as bed, sofa ... etc
2. cooling pad is an added advantage if one wants to use for a prolong time
3. not under direct hot sun
4. air-conditioned room isnt as good heat reducer as a normal table fan

as notebook using a small fan to dissipate heat, one need to be cautious or take estra care to reduce its heat.