The internet on my macbook pro keep cutting out in OS 10.8..What to do?

Hello,
I purchased a new macbook pro about in early September and ever since I started using it in my home, the internet cuts out constantly. I was using a aiport to connect wirelessly and then swithced to a router provided by my internet company which is Time Warner. I have the fastest package they sell but nothing seems to help. The internet cuts out after about 5-10 minutes everyt time I use the internet and download speeds are nowhere near what they should be for the package I have.
I'm using the newest OS (10.8.2).
Any help is very much appreciated!
Thank you

Hopefully one of these steps should solve the problem.
1. System Preference > Sound > Output > Internal Speakers
    Highlight Internal Speakers
    Make sure that Mute is not enabled.
2. Remove the headphone.
    If you see red light in the headphone port, plug the headphone
    in and out of the port 5 or 6 times to flip the microswitch inside.
    Sound output may be stuck in the digital mode.
3. Reset PRAM. http://support.apple.com/kb/PH4405
4. Reset SMC.     http://support.apple.com/kb/HT3964
    Choose the method for:
    "Resetting SMC on portables with a battery you should not remove on your own".
5. Applications > Utilities > Audio MIDI Setup
    Audio Devices window
    Side Bar
    Click the Built-in Output.
    Under Mute any of the boxes checked? If so, uncheck it.
6. System Preferences > Sound> Sound Effects
    Play sound effects through:
   Select "Internal speakers" and then back to "Selected sound output device".

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