03-31-2015 04:29 AM
I'm just trying to speculate due to lack of info. Your hdd is a gpt partition style disk just like most of the Lenovo units. Because of this your Windows OS to be installed must be a 64-bit Windows 7 version. So check it out if this is your situation. Before proceeding with the downgrade be sure you know what you are doing and have the necessary drivers and programs. Expect also some difficulty (it will not be a smooth transition process).