Vista - Plug a cable into network adapter "local area connection"

Hey, so I have a problem and although i'm terrible at describing computer problems I'll give it my best shot. So one day I turn on my HP Pavilion dv6000 with Windows Vista x64 Ultimate and the internet would not work and it had been the previous day. The wireless connection switch is turned on and the light is blue, not orange, but my computer will not detect any networks. My little brother has an HP desktop with the same OS but he is not having problems connecting or finding the network so the problem is obviously internal to my computer. WHen i diagnose and repair it...i get the message: "plug a cable into the network adapter "Local Area Connection"." Again my connection is wireless and i have no idea how to fix this problem. Any help would be greatly appreciated.