connecting to home network between PC and Laptop

[PizzaGirl]

We have a Pc connected to internet thru cable modem. We have a laptop and it connects to the main computer thru a cable router. Both of them can connect to each other and share files. When I got my laptop I tried to set up to connect to home network. I get to the page where it says "Give this computer a description and name". I have tried naming the laptop I am trying to connect to the network but it doesn't work. I have tried to put in the name of the computer (main PC) that I am trying to connect to and the router is attached to, but it says theres already a computer with that name.

What am I doing wrong? I have tried accessing my computer from the Main PC but I cannot.

I am so frustrated. Can someone help me?

 

[blue68f100]

Are you using a router?

Modem -> (wan) Router (lan)-> PC's ....

 

[PizzaGirl]

We connect thru a Wireless router. Main pc and 2 laptop connect. I do not.

Sorry for not making that clearer. It is not a cable router.. its wireless.

 

[blue68f100]

To set that right click on "My Computer" select properties.

You can enter the name and group under "Computer Name"
Names must be Unique, No duplicates.

Will require a restart after changes have been made.