How to make your computer Ethernet instead of a WiFi connection?

My Windows 7 desktop computer has both WIFI and wired Ethernet, I want to used wired only because it faster. I do not want to disable the WIFI on the router as I have a laptop and an Xbox I want to keep connected. How do I disable it, so it will not come back on when I restart?

Click start button> run> type ncpa.cpl hit enter.

Find the connection that is your WIFI and right click it and then click 'Disable'. It will now stay off till you enable it the same way.