Sony :: Vaio Overheating

I bought a VPCF111FD about 3 months ago and on my 3rd day of purchase, my laptop froze while browsing firefox with 3 browsers open and a youtube link. The fan started to make a lot of noise and I could feel a lot of heat coming from the side grill. I had to manually shut it off.

Just last week, the problem began again when it was a warm day in the house. I was playing a video game (League of Legends) and the computer froze while the image on the screen turned purple as heat began to pour out of the machine. I freaked out and shut down the computer, and when I came back an hour later to turn it on, it would get to the Vaio screen (or Windows screen sometimes) and then just freeze as the fan picked up again. This happened several times until a message displayed saying, "The i7 processor is now booting from the factory image".

The next day, everything ran completely fine and I even tested by running Team Fortress 2 and doing CAD modelling and no freezes occured. I made sure by doing a spybot, Avast, Defragment, and System restore scans. Then today, the same thing happened with the laptop freezing while I'm playing a video game.

I think the problem is with the fans since they don't get loud until the computer freezes, but I'm not entirely sure if heat is the problem since there are days when I can game for hours on end with nothing happening.