Gateway Laptop Wi-Fi problem

Hello,

I was using my Laptop this morning, on the internet. I was using it when my internet crashed. I decided to restart my router to see if that would work and it did not. I then ran a search of my computer using Norton internet security, Full system scan, and then reset my computer. My wi-fi still does not work. I have used my iPod and my sisters laptop after the crash and they run on the same wi-fi my laptop does. Any advice or tips would be greatly appreciated. Thanks :)