Upgrades from Windows 7 or Windows 8/8.1 as previously announced are free for the first year of availability.
Windows 7 Starter, Windows 8/8.1, Home Basic and Home Premium users will receiveWindows 10 Home.
Windows 7 Professional, Ultimate, and Windows 8.1 Pro users will receive Windows 10 Pro.
However, Enterprise users will get nothing, as upgrading is usually considered a part of their license agreement.
However, one needs to keep in mind that thisupgrade is availablefora years time only.
source: www.techworm.net
