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Screenshot (3).png
Windows 8.1 build 9431's Start Screen
Codename(s) Windows "Blue"
Kernel version NT 6.3
CPU Architecture x86, x64, ARM
Latest build RTM
Release date October 22nd, 2013
Licence Microsoft EULA
Support Supported
Other versions
Windows 8
Windows "9"?

Windows 8.1 (codenamed Windows Blue) is a free update for the Microsoft Windows 8 operating system. It is version 6.3 of the NT kernel.

Tami Reller, corporate vice president and chief financial officer of the Microsoft Windows division, announced the release of the Windows 8.1 Developer Preview during the Build Windows conference in June, 2013.

Enhancements have been made to the overall Windows 8 experience, including the reinstatement of the Start button, the return of unified search results, new Start screen customization options, and horizontal application snapping improvements.

Windows 8.1 also includes new Alarm, Calculator, Movie Moments, and Sound Recorder applications. Internet Explorer 11 was also released with this update.


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