Connecting 2nd PC to Voyager 2110

[#1]

Can anyone help me?
For over a year I've been successfully running my PC using the wireless link on my BT Voyager 2110 router.
I am now trying to run a second computer, connected by a cable, from the same router - the instructions say just to just plug in. The PC seems to see the router OK & I can access the Voyager menus etc. However I don't seem to be able to get to the internet itself.
Does anyone have any ideas? The PC that I'm using was previously on an office network - might that be affecting what i'm trying to do?
Thanks for any advice,
Arthur Jones

[#2]

Quote from: cuilvona

The PC that I'm using was previously on an office network - might that be affecting what i'm trying to do?

Easily.
Change all the network - TCP/IP settings to automatic and it chould be OK.
Could well have specific IP addresses, gateways, proxies and/or DNS servers set up.