On October 1, 2014, Microsoft held a new product launch conference in San Francisco and unveiled the new generation of Windows operating system, named "Windows 10".
On January 21, 2015, Microsoft released the new generation of Windows system in Washington and stated that it would be available to all devices running Windows 7 and Windows 8.1. Users can enjoy free upgrade services in the first year after the release of Windows 10 [4].
On March 18, 2015, Microsoft China's official website officially launched the Chinese introduction page for Windows 10.
On April 22, 2015, Microsoft launched Windows Hello and Microsoft Passport user authentication systems, and subsequently announced a security feature called "Device Guard".
On April 29, 2015, Microsoft announced that Windows 10 will use the same application store, which can be displayed to all devices covered by Windows 10 and support Android and iOS programs at the same time.
On July 29, 2015, Windows 10 was officially developed.