Windows 10 is expected to be released in late 2015.[43][41] During its first year of availability, upgrade licenses for Windows 10 will be available at no-charge to users of consumer editions of Windows 7 and Windows 8.1.[37] Enterprise versions of 7 and 8.1 are not eligible to receive free upgrades under this promotion, but as with previous releases, customers under an active Software Assurance (SA) agreement will be entitled to upgrade to Windows 10 under their existing contracts, nor will customers whose SA contract is expired, or has enterprise licenses that only cover existing versions of Windows and have no upgrade rights. It is unknown how Microsoft will monetize licenses for the consumer versions of Windows 10 following the conclusion of this promotion.[37][46] A separate update with “some” of the changes of Windows 10 is planned for Windows RT.[47]
On February 2, 2015, Microsoft announced that it would provide a free ARM port of Windows 10 for Raspberry Pi 2 devices through its Internet of Things developer program.