network on but no internet

one big question.... what type of internet feed to you have? is it DSL or dialup or something else?

If it is dsl or cable, does the feed go to the wan side of the linksys? Try connecting 1 computer directly and see if that works...

If it is dial-up or some such... the connected computer is on the wan and the client is on the lan? if not.. your routing will be wrong since the dhcp on the linksys will be directing the default gateway to the wrong IP address.
Actually, in this version, you don't even need a router, but rather just a switch and use fixed ip addresses

If you give us more detailed information, we can try and help you further.

if you can ping your router then those are classic signs of no dns server. you probably need to do an ipconfig /release then ipconfig /renew from the command line

well the router ought to supply the computers with the necessary information such as an IP address, subnet mask, default gateway and DNS servers provided that the router's DHCP server is enabled. Typically, you need to uncheck all the boxes in IE/tools/internet options/connections/ LAN settings/automatic configuration [if you use IE ]. The instructions that came with the Linksys router usually explains this.

When you say protocol set to share internet, did you mean to say you ran the ICS wizard?

This system was working during x-mas. Since then the laptop has stopped getting internet. I really don't remember anything that was done to change any settings.The DSL connects to the main computer thru a Cisco Systems 350 Series PCI Wireless LAN Adapter. The main computer has internet access. The compaq laptop can either connect thru a cable to the router or by a d-link wireless card. Neither way will get internet access. I have reset the router, changed the nic card, and reinstalled the d-link card.

My cisco lan card has broadband supplied IP settings and is set to share internet connection and the "use Windows to configure my wireless network settings" is not checked. I have the main computer 3com card manually configured with 192.168.0.1 and subset mask 255.255.255.0. My router is default to 192.168.1.1. My laptop wireless card is set to obtain IP automatically.

The router is letting the network work. What could be stopping the internet from being shared from the main computer to the laptop?

OK as it was previously working I can only suggest a fix from known problems that I've run into with these things.

Sometimes you get a power ripple and it messes up the Modem/Hub/Switch the solution here is to disconnect the power supply from the above mentioned components allow the capacitors to discharge and reconnect them and they generally work after that. As you have maintained the LAN I would first be looking at the Modern as the culprit but would disconnect all the devices for about 30 seconds and allow them to reset themselves and see how that goes.

This happens quite a lot where there are heavy industries or a lot of Air Conditioning/Electrical Central Heating involved as these devices put a major power drain on things as they switch on and can cause this problem to occur far too often.

Col

check the ports and make sure they are fuctioning properly and make sure your tcp/ip settings are correct

Use the Win XP Networking Wizard to set the network up, its a bit of a pain but that usually fixes it.