When is Windows10 coming out?

When is Windows10 released? Microsoft Win10 release time
Beijing time March 18 morning news, Microsoft plans to officially launch Windows 10 operating system this summer, but Microsoft did not give an exact date.
Windows department director Terry · Terry Myerson today promised that Winddows 10 will be officially released this summer. “We have made significant development progress and announced today that Windows 10 will be released in 190 countries this summer, providing a total of 111 languages ​​for users. ” Myerson said.
Microsoft released the consumer preview of Winddows 10 in January this year. The new operating system will integrate Cortana voice assistant and replace the traditional IE with a newly developed browser. At the same time, Microsoft also promised that Windows 7 users can upgrade for free within one year of the release of the new system.