How to connect another computer to the internet through a router?

Question

I already have conected one computer, and the internet works,
it is wired
the computer i want to connect is windows XP

Answer 1

It should be as simple as connecting the wire to the router.
Your computer by default should be set to DHCP and pull an address from the router and work.
If you don't get an address check your network settings in control panel...Network Adapters --- properties -- TCP/IP select Get an address automatically and get DNS automatically .

If your using wireless that is a different story but basically just select the correct SSID and click connect. (If protected --which if should be just enter the password)

Answer 2

You just plug in another PC, if your router more or less new, it'll do everything automaticaly.