It's not safe to put your laptop in the freezer as the water condensation can cause the laptop to short circuit and damage the screen and circuit boards.
If you're simply wanting to cool the laptop down then you can use a big fan to blow air directly over the laptop to cool it down.
Electronic devices suffer from temperature extremes.
Liquid Crystal Displays (LCDs) of laptops, phones, and PDAs really do freeze.
Laptops have been designed to work within a safe temperature range, typically between 50 to 95 degrees F (10 - 35 degrees C).
Never leave your smartphone, notebook, tablet, or any other mobile device in your cold vehicle for extended periods of time.
Even with a case, such extended time can cause permanent internal and external damage.
Be extra careful around snow as well.
You can also cool your laptop using a laptop cooling table.