If you want to check the temperature that your computer is running at (CPU, hard drive, memory, etc.), there is this program for Dell Inspiron/Latitute/Precision that measures the temperatures of the system and can control the fan.
Look here .
I don't know if this would help, but at least you'll know for sure if the computer is overheating.
My computer has the following temperatures (average, in Celsius):
CPU: 43
GPU (related to graphics): 64
Memory: 43
Chipset: 45
Hard Drive: 44
I don't know if these are high or normal, but I don't have problems with my laptop.
When I open Google Earth, all temperatures increase *A LOT*, so the temperatures depend on what you are running on your computer.
malu