Windows 10 is a free upgrade to Windows 7 and 8

Windows 10 will be a free upgrade to genuine Windows 7 Service Pack 1 and Windows 8.1 as Microsoft had announced earlier this year 2015...The update will be available on 29 July 2015 on wards for none business consumers via Windows Update and will be permanent...Please read this article on PCWorld 
        http://www.pcworld.com/article/2873214/windows-10-will-be-a-free-upgrade-for-windows-7-and-8-users.html