But you can start by setting up per the forum sticky in our Networking Forum. This is where I start and work from there.
Sorry for the lack of details. I have a Linksys wireless router, I have everything connected right. I just started getting a "cannot connect to DNS" on my lap top and my X box 360 but my main computer works fine. The laptop is an HP running Vista, and my tower is running XP Pro. Everything worked fine untill this week. My Tower and my 360 are but connected with a cord and my laptop is wireless. I've tried to reset the router and cable modem several times and I've tried to autofix the laptop several times. Nothing worked except my main compter.