What is the Next Version of Windows after Windows 10

What is the Next Version of Windows after Windows 10

Windows 10 was launched in July 2015 just after the Windows 8.1. Windows 8 was not successful because of it's interface and no availability of Start Menu.

Windows 10 was launched in July 2015 and Microsoft improved it well as compared to previous version.

Now what next?

No one has any idea about it.