LAN finds router, but can't connect to internet

I've had my new laptop up and running for about a week now with no problems with a wireless router connected to a cable modem. All of a sudden last night it would no longer connect to the internet, although it still finds the "excellent" signal from the router.

I brought the laptop in to work today to try it on the wireless there, and it did the same thing. It finds the router, but won't actually connect to the internet.

I know a little bit about computers, but I'm not confident enought to really know what's going on.

Any words of advice?

Please help.

Thanks!

I didn't find the right solution from the Internet.

References www.cnet.com/forums/discussions/lan-finds-router-but-can-t-connect-to-internet-23465/

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