Adding Windows 7 to a new laptop with Windows 8

I just got a new Lenovo laptop with Windows 8. I need to have Windows 7 because I will be using the laptop for inventory and price control in our hardware store and the programs haven't been used on Windows 8 yet. How do I add Windows 7 as a dual boot? Everything I've read is for adding Windows 8 to a system using Windows 7 or earlier. I read where I can downgrade from 8 to 7, but I got stuck because I couldn't disable the Secure Boot Control as one of the steps in the instructions. So, if anyone can point me in the right direction to add 7 to my existing 8, I would be gratefull.

Thanks
Steve

You can install Windows 7 in dual boot first or second.

Follow Step one to five in this tutorial:
http://www.eightforums.com/tutorials/13326-downgrade-windows-8-windows-7-a.html

Than follow this tutorial:
http://www.eightforums.com/tutorials/2344-dual-boot-installation-windows-8-windows-7-vista.html