I would start on this by resetting the router to defaults. On a Linksys 
router this usually involves a small button on the back you can depress 
and hold with a paper clip or something similar. Hold it in for 10-15 
seconds. See your router manual for exact parameters.
After re-connecting everything, open a Run box, type cmd, OK.
In the cmd box, type ipconfig/all and post the results here. Ipconfig is 
explained here:
http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/ipconfig.mspx?mfr=true

Larry Adler (Cebridge) wrote:
> As I am still mystified on my wireless network problems, I decided to 
> start completely over (except for unhooking my router and cable modem) 
> and reinstall Windows XP Pro. Regrettably, it appears nothing has changed.
> 
> Question: I have been able to browse the Internet swimmingly with my 
> Linksys router. But on a whim after seeing the reinstallation basically 
> did nothing, I decided to unhook the router and plug the cable directly 
> into the modem, just like the old days. However, I could not get 
> anything to come up on the Net, even after powering down the modem two 
> or three times. Could this reveal something screwy about my network 
> problems? Apparently the computer can't read the actual IP address 
> coming from my service provider; perhaps all it can "see" is the router 
> address, 192.168.1.1. Does this even make sense?

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