Wired connection lost DIU

I have one computer that works fine. And connects to the Internet. And many websites.
On a laptop, suddenly, I find a complete loss of internet connection. All websites can not be accessed. Usually, it says something like "detecting proxy settings" or something, flips by, when you first start the browser. It waits for a very long while. And finally gives up, and presents a white screen, and page not found. Can't get email either.

I try some commands:
PING 192.168.1.1

Trying to ping my router. Result:
Destination is unreachable.

I try:
PING www.google.com
result:
unknown host

I believe that the Linksys router is working just fine.

My laptop is running Windows 2000 PRO SP3.

Can you suggest where to proceed from here?

 

Well, windows 2000 sp4 is out. But, since you can't connect to the internet to download this sp, we need to fix your issue.

at the cmd prompt try:

ipconfig /renew

One note, did you hardwire "manually type in the ip for this machine"...i.e. use static ips?