After Windows 7, Windows 10 will be a most successful version of Windows.
Also, Microsoft wants to keep all the users on the same version which is Windows 10. So, this time upgrade is free to all the users who has Windows 7, Windows 8 & Windows 8.1
Windows 8 is released with touch screen users in mind.
But, Windows 10 serves both touch screen users & mouse users more efficiently.
How to get Windows 10?
1) Turn on automatic Updates and install all the updates.
2) Finally you will get a Windows 10 icon in the task bar notification area
3) Click the icon and click the Reserve now button in the Windows 10 App window.