Suppose I have Windows 7 operating system and I take Windows 10 E3 subscription and upgrade my OS to Windows 10 Enterprise and after 1 year I decide not to renew the subscription according to Microsoft my OS will stay Windows 10 Pro. What I want to know is after my subscription expires and my OS gets corrupted and I have to reinstall my OS how can I get back Windows 10 Pro back in my computer or that is not possible?