Microsoft said the free upgrade offer to Windows 10 will end on July 29.
Those who want to upgrade after July 29th, will need to have Windows 10 on a new device, or purchase a full version of Windows 10 Home for $119.
The software giant said Windows 10 is now running on 300 million active devices around the world.
Highlights of the Windows 10 include, Microsoft’s voice-based smart assistant Cortana, an Xbox app for gaming and a new browser, Microsoft Edge, replacing Microsoft’s Internet Explorer.