Note downgrade rights are only available as long as Microsoft provides support for that earlier version, Note Other OEM Windows 7 versions (for example, Windows 7 Home Basic and Windows 7 Home Premium) do not include downgrade rights. Windows XP Professional, Windows XP Tablet PC Edition, or Windows XP 圆4 Edition.Windows Vista Business and Windows Vista Ultimate.Windows 7 Professional and Windows 7 Ultimate include downgrade rights to: Windows 8.1 Pro includes downgrade rights to: Windows 10 Pro includes downgrade rights to: The following OEM versions of Windows software are eligible for downgrade rights. It is an old Microsoft link which they removed but the information still apples>
As it is an OEM preinstalled operating system Windows 10 Pro, you will have to contact Lenovo and discuss this with is the information about Downgrade rights.
