Macbook Pro Freezes after Starting up - Airport?

Hey everyone
I am currently using my 17'' mbp bought in June 2007 and running OSX 10.9.1 Mavericks.
I recently (in November) started having freezes issues.
It first started in the train, I turned on my computer, it started up, the desktop appeared. Up until there no problem. Then suddenly, as I was opening a finder folder, the computer froze. I don't mean froze in the sense where I had the little color ball turning and turning forever. I mean froze in the sense that my screen, my keyboard, my mouse, nothing was responding. I had no choice but to force shut down it. I restarted it and the same problem occured again but this time I didn't even try to open anything. I tried a safe boot and it froze again before I could login.
When I arrived to my hotel room, I tried to do a desesperate back up and then miracle: it worked as usual. Worked great until I took the train again and turned it on. And then again, it stopped working.
Came home from my trip: worked like a charm. I thought it was really weird but since I hadn't had any problem since I decided not to pay attention.
However, now it is doing it again. It did it once at the airpor: impossible to make it work again.
When I got home it started doing it again but then stopped.
It did it again today when I came back home from anotehr trip.
Does any one have clues on whether this is hard drive related or software? I saw on this page that it could be the airport:
https://discussions.apple.com/thread/3167635?start=30&tstart=0
Which would make sense with my problem. The thing is that I tried copying the code and following the instruction but Terminal always said: 'can't find these directories'....
Anyways, any one has another explaination? If it is indeed an aiport related problem, would reformatting my mbp clear this error?
Thanks a lot for your help!
Best

Back up all data immediately as your boot drive may be failing.
If you have more than one user account, these instructions must be carried out as an administrator. I've tested them only with the Safari web browser. If you use another browser, they may not work as described.
Triple-click anywhere in the line below on this page to select it:
syslog -k Sender kernel -k Message CReq 'Channel t|GPU D|I/O|n Cause: -' | tail | open -ef
Copy the selected text to the Clipboard (command-C).
Launch the Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
Paste into the Terminal window (command-V).
The command may take a noticeable amount of time to run. Wait for a new line ending in a dollar sign (“$”) to appear.
A TextEdit window will open with the output of the command. Normally the command will produce no output, and the window will be empty. If the TextEdit window (not the Terminal window) has anything in it, post it — the text, please, not a screenshot. The title of the TextEdit window doesn't matter, and you don't need to post that.

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Message was edited by: S.U.

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