Ubuntu OS Assistance

Hi,

Just decided to install Ubuntu on one computers I have recently built. The network works and I am able to access files on my other computers from the shared folders, however I am not able to access the Internet.

Last year, when I installed it on another system, it worked fine, but at the time decided to get rid of it and install Windows XP again, I didn't have time to learn it.

Ubuntu has picked up my network card (onboard LAN) and I am able to access files on other computers from it.

But no internet!

Anyone help with this?

Thanks