Windows 10, the last version of Windows as claimed by its owner, Microsoft Inc. will be available for free to upgrade from the existing full version of windows 7 and 8 (or 8.1).
Windows user will get the windows sign as in the picture above in their notification area. On clicking the icon, anyone can make the reservation of free upgrade package. Windows 10 will be available to all the users of Windows of around 190 nations by July 29 2015.
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| Upgrade is Reserved ! |