Disabling/Del on-board NIC?

I am working on an HP Pavilion 510w. It has both an on-board NIC and an actual card. How can I disable/delete the on-board so that when the computer reboots it will not find it? I have tried the normal "disable" and "unistall", but when the computer reboots, it's back.

I'm sorry. I should have looked a little harder before I posted.

I pressed F1 and enetered the "Setup". I then went to Advanced and Disabled the On Board NIC.

:)