If you upgrade from a retail version, it carries the rights of a retail version. Because the free upgrade is derived from the base qualifying license, Windows 10 will carry that licensing
If you upgrade from a OEM or retail version of Windows 7 or Windows 8/8.1 to the free Windows 10 upgrade this summer, the license is consumed into it.
When I upgrade a preinstalled (OEM) or retail version of Windows 7 or Windows 8/8.1 license to Windows 10, does that license remain OEM or become a retail license? To: Setup Windows 10 on your Mac using Boot Camp How to Transfer your Windows 10 License to a New Computer If the Windows 7 or Windows 8 license was a full retail version, you can transfer it. If the Windows 10 was upgraded from a preinstalled copy of Windows 7 or Windows 8 on your current computer, the answer is no.
