I have a MBP that was working great with my wireless network. I went to do a software update and it displayed an error with network message. I clicked the network diagnostic button, followed some prompts and it eventually said it can't help me. Since then I have not been able to connect to the wireless network. My 2 windows and 1 Ubuntu machine connect ok. I've looked around and googled for help with no luck. Also I’m a mac newbie, so I might have over looked something simple.