to have multiple computers connected. When you connect to the router, does the network connection icon down by the clock show it is working? Normally it has a red X through it when not connected and no red X when it is. Connect your notebook, right click on the icon and select repair. See if that repairs your IP address and allows you through.
I always seem to have a problem when connecting to the internet with my laptop at home. I think it might be because I already have more than one computer connected to the internet, so the router doesn't recognize my signal. I've tried going to the control panel, to network connections and disabling and then re-enabling my internet connection, but that doesn't work. The internet connection status says that I'm sending around 800,000,000,000 packets, but receiving only 2. I'm kind of at a loss right now, so some help would be appreciated. 
I don't know if this info will help but..
The type of router I'm using is by Linksys. Model BEFSR41. And the laptop I have is a Sony Vaio PCG-R505EL.
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