I got a Macbook like 4 days ago and a first i didn't know how to connect it to the my at&t modem via airport and so i kind of messed with the settings. I final realized that I had already been connected after i turned it on and off two times. My question is, is there anyway to reset the settings? the internet is kind of slow at times and after a while the browser just stops working. Is this normal? Is there anything I can do to make it faster?