How do I reconnect a computer to my network?

[Rmcta]

I have cable for the internet and a friend connected my 2 computers to it.
One of the computers was having too many problems so we gave it to someone who re-built it.
I now need to reconnect it to the internet but don't know how to.
Can someone guide me?

This computer has Win2000 while the one I am trying to connect has Win 98.

When I click on MY Computer/Control Panel
I see:
Local Area Connection 3: connected
Local Area Connection 4: connected

What do I need to do to make my win98 connect?

 

[bcastner]

Run the Winsock repair tool in the Win98 machine: faq779-4625