Lenovo C340 i3 System - Dual boot windows 7 / 8 cant load windows 7 please help

Hi there
I have a lenovo c340 all in one pc the i3 processor type which came with windows 8
I have purchased a new hard drive and would like to dual boot windows 7 and 8
I have tried to install windows 7 and the system hangs before I even get into any configuration however windows 8 loads fine
I have looked in the bios and the system is showing windows 8 . has lenovo locked the bios to allow windows 8 only ?
Is there a way to load windows 7 onto the system ?
I really want to dual boot and have downloaded all of the drivers for windows 7 but for the life of me I can not get past the initial boot screen of my windows 7 disc
Can anyone help please

hi botards01,
If you're planning to use linux occasionally (Ubuntu for example) and you don't want to risk losing the One Key Recovery functionality, try to install Ubuntu via Wubi as this doesn't repartition your HDD but creates a virtual disk on your current OS.
Check it out - Install Ubuntu in Windows With Wubi
Hope this helps
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