[Joeaksa]

Reboot the computer, pull the power on the modem and router. Power up the modem after the computer is up and going then power up the router.

I have used a "best data" cable modem the last 4 years with no issues. A month ago started having little or no connection to the net. Tech found a weak signal and replaced all the cable to the house. 2 weeks later same thing and ended up that Cox Cable is not supporting my old modem. It still worked fine but they changed something in their system that made it not compatable.

Finally had to go with a new modem and it works fine but am somewhat perturbed with Cox.

If you do the above in that sequence it should start talking with everything. Like Bill says, if not then it really points to the router. I have had a Linksys router that worked fine for 11 months then started losing ports. Finally it got down to where only the WiFi and one cat 5 port worked. Replaced it and the Netgear router has worked great so the routers/switches do fail. You might try using another port on the router for the cable to your computer.

JoeA