Set to receive the upgrade through Windows Update would be Windows 7 SP1, Windows 8.1 Update and Windows Phone 8.1.
Upgrades are scheduled to be made only for those PCs and tablets running Windows 7 SP1 and Windows 8.1. Later this year Windows 10 will also be updated.
If you have older editions will need upgrades through DVD’s or USB drives. Following the launch this summer, Microsoft will be offering some free upgrades for consumers and businesses to Windows 10 over a 12 month period.
In WinHEC in Shenzhen, China, Microsoft recently presented the upgrade paths planned for Windows 10.
On Desktops and Tablets
Windows Update will serve the Windows 10 upgrade to devices running Windows 7 Service Pack 1 (SP1), which debuted in early 2011, and those powered by the April 2014 Windows 8.1 Update. Microsoft tags the latter as “S14.”
Older versions can be upgraded including the original 2009 edition, Windows 7 RTM (for “release to manufacturing”); Windows 8; and Windows 8.1 RTM. It’s important to know that they will be upgradable only from installation media, like a DVD or USB drive, loaded with a disk image downloaded from Microsoft’s servers as an .iso file.
To upgrade Windows 7 SP1 and Windows 8.1 S14 systems the.iso file-physical media combination can also be used.
Microsoft has yet to define all the details of the upgrade process, however a ‘direct upgrade’ will retain settings, data and applications from Windows 7,8 and 8.1.
Windows 10 will have no upgrade path to Windows XP or Windows Vista.
Although Windows RT will receive an update later on, it won’t be upgraded to Windows 10 which gives us the indication that it’s the end of the line for RT.
Regarding smartphone, an upgrade to Windows Mobile 10 — the name Microsoft used at WinHEC — will be possible only from Windows Phone 8.1. Unlucky for those who have devices which remain on Windows Phone 8.0.
Windows 10 and Windows Mobile 10 are currently going through a Technical Preview Phase.