15/07/29 22:38:24.23 4eF/Lafl.net
URLﾘﾝｸ(answers.microsoft.com)
> 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.
> If you upgrade from a retail version, it carries the rights of a retail version.
> If you upgrade from a OEM version, it carries the rights of a OEM version.