Macbook Pro (Late 2010) breaking down.

Question

Alright, so I bought a Macbook Pro on Black Friday at the Saint Louis Galleria mall. For two years, it's been running relatively well, but suddenly, two months ago, I started having extreme problems.
First of all, the wifi on the computer seems to have gone haywire. 9/10 tries on opening a webpage on any given browser, it gives me an error about the DSL link. Now, I'm not that experienced with technical stuff, but I think this has to do with my computer, since there are three other computers in the house that run on the same wifi, and they are running just fine.
Next, my fan stopped working. It makes weird crackling sounds time to time, and I've tried using SMC Fan Control, but it just rests at 0RPM, and at 150-190 degrees F. Now, I'm pretty sure that's not good for the computer, running at that temperature. This causes the computer to lag uncontrollably on opening any video, or application that takes a medium amount of RAM, for instance, it starts chopping up Youtube videos and iMovie or Skype.
The third problem I'm having is the battery life. It's gone from the alleged 10 hours down to about 45 minutes. Once I unplug the charger, it's a waiting game, it goes to 100% to 50% in about 20-30 minutes.
I wonder if anybody else has had these problems. I have never spilled anything on my laptop, and have never dropped it either. It's warranty lasted 1 year, and I don't have the cash to buy another computer. I have already tried resetting it a month ago, wiping everything off of my computer, but it STILL DIDN'T WORK!! Please help!
Thanks,
Tolga

Answer 1

You have the MacBookPro6,2, the Edsel of Macs. It may be covered by this program:
MacBook Pro (15-inch, Mid 2010): Intermittent black screen or loss of video
Make a "Genius" appointment at an Apple Store, or go to another authorized service provider, to have the machine tested. The routine hardware diagnostics used by service providers may not detect the fault. There is a specific test for this issue.
Print the first page of the panic report, and the support page linked above, and bring them with you.
Note that the replacement program only applies within three years of purchase. If you wait beyond that date, Apple may refuse the service. In that case, you'll be quoted a price of about $300 (in the U.S.) for a depot repair.
Back up all data on the internal drive(s) before you hand over your computer to anyone. If privacy is a concern, erase the data partition(s) with the option to write zeros* (do this only if you have at least two complete, independent backups, and you know how to restore to an empty drive from any of them.) Don’t erase the recovery partition, if present.
*An SSD doesn't need to be zeroed.
You may be able to stop the panics by disabling automatic graphics switching in the Energy Saver preference pane, but that's not a solution. 
Most likely, the logic board will be replaced. Sometimes the replacement part is also defective, so be prepared for that possibility.