Well your computer is not receiving a proper IP address.
I would suggest a power cycle of your stuff.
Turn off the computer
Turn off the cable modem
Turn off the router if you have one
Wait 30 seconds
Turn on Cable modem ( wait 30 seconds or until lights are properly lit)
Turn on router if you have it. (wait 30 seconds)
Turn on PC
Try Internet again.
If it still doesn't work, run "ipconfig /all" again and see what the IP address is. If it is 169.254... then it is wrong. Your computer is not receiving an IP from the modem, or from the router.
If you have windows 9x you can click start-run and type "winipcfg". When that opens, select your VIA Rhine III from the drop down box. The click the "Renew" button and see if it gets a different IP address. If it still doesn't, then your cable modem or router may have a problem. Call your ISP.
If you have XP, you can go start-run and type "cmd". Then type "ipconfig /renew" and see what happens.
Basically, if your IP address is 169.254 then your router/modem is not talking.
Make sure the lights are lit properly on the devices. Check the user manuals to find out what they are.
If not then there is the problem. Although there is a small chance that even your network card is bad. But we won't go there yet
Hope that helps