Sua licença do Windows 7 não se tornará inválida atualizando para o Windows 10. No entanto, ela também faz parte da sua licença do Windows 10, portanto, você só tem permissão para ter uma instalação do Windows 10 ou uma do Windows 7 por vez. chave.
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?
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. Because the free upgrade is derived from the base qualifying license, Windows 10 will carry that licensing too.
Your Windows 7 license will always be valid and will not be changed or deactivated because of the upgrade to Windows 10: you'll be able to install or restore Windows 7 again in case you'll need to do that (provided that you've the Windows 7 installation DVD