Don't put your laptop on your lap!
By doing so you can block the intake/exhaust vents.
Get a can of compressed air and blow air on the fan and vents.
Download, install and run SpeedFan. Don't mess around with the fan control part thereof, but rather use SpeedFan to monitor your temperatures.
You have three power plans available: Power Saver, Balanced and High Performance.
Since you are having heat problems, then do that which I do when operating my laptop in a hot beer garden--set it Power Saver. Your temps will go down.
High Performance will drive the temps up. WIN X
key combo will pop up the Windows Mobility Center.
In the section displaying your battery status, you can select a power plan.
WIN is the key with the wavy flag.
Here's link for SpeedFan: SpeedFan - Access temperature sensor in your computer