Two computers, one router.

[Andrew_301]

So I'm trying to conect two comptees tow this router which is connecter to a motem. I'm new with networking so I'll try to help you help me.
So far what's been happening is if one computer is connected it works fine, the second another is added they both don't work. It connects to the network and not the internet. Also sometimes it'll even drop the network and not even fiND that. It's really annoying please help both computers work again.

 

[schwatzz]

Are you using an Ethernet cable or wifi? Both computers should be getting internet access if they are connected to the router.

 

[Ralston18]

What make and model is your modem and your router?

They may be incorrectly connected and/or incorrectly configured.

Especially if the modem is actually a modem/router.

Knowing what devices you are using will be very useful information. They must be correctly connected and configured to work together.

Also if you can run and post the results of "ipconfig /all" from the command prompt when just the one computer is working that information will also be very useful. Knowing how one computer is configured and working will provided guidance to connect and configure other computers.

 

[boosted1g]

Sounds like you may be using a switch or something in a an incorrect configuraiton.
Your ISP only provides 1 IP address and thus the very first connection from your modem needs to be a router to allow more then one device to use the internet.

Can you list model numbers of all devices you have (modems, routers, switches, etc).
Is there an ethernet cable plugged into the WAN port of the router, or only the LAN ports?
In router configuration is it set to router mode (could also be called Gateway mode) or to AP mode?