BGR writes the head of Microsoft Indonesia confirmed that Windows 9 will be available free of charge to all existing Windows 8.x users.
According to Diantoro, the Windows 9 upgrade will be available free of charge to all existing Windows 8 users once it’s released. Apparently, users will be able to easily install the Windows 9 update after downloading it from Microsoft, which is how Apple’s OS X updates have been rolled out to Macs for a few years now. For what it’s worth, some of the recent Windows 9 leaks did say that Microsoft already has a tool in place that will allow users to easily perform software updates.
There are also rumors that Microsoft is planning a special action for users of older versions of Windows, and Windows XP in particular, but this is yet to be revealed.