Windows 8.1

Windows 8.1

Windows 8.1 build 9431's Start Screen
Codename Preliminary name	Windows "Blue"
Kernel version	NT 6.3
CPU architecture	x86, x64, ARM
Release date	October 22nd, 2013
Support end	Supported
Preceded by	Windows 8
Succeeded by	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.

Builds

• No information available
• Existence doubtful
• Information or pictures available
• Leaked or released

Milestone 1

• 6.3.9319.x86fre.fbl_eeap.130208-1820
• 6.3.9326.0.fbl_uip_dev2.130225-2000
• 6.3.9345.0.winmain_bluem1.130218-1736 - files from this build are present after updating build 9385
• 6.3.9347.winmain_bluem1.130220-1504
• 6.3.9364.0.fbl_partner_out13.130315-2105 - Leaked on 24th March 2013.
• 6.3.9369.0.fbl_partner_out14.130324-1300 - Leaked on 16th April 2013.

Milestone 2

• 6.3.9374.0.fbl_partner_out15.130329-2355 - Firstly partially leaked, then fully leaked on 19th April 2013.
• 6.3.9379.0.fbl_partner_out16.130410-0711
• 6.3.9385.fbl_partner_out17.130415-2049 - Leaked on May 1st, 2013
• 6.3.9385.3.fbl_uip_dev2.130326-0847 - files from this build are present after updating build 9385
• 6.3.9391.3.fbl_partner_out18.130426-2000 - files from this build are present after updating build 9385
• 6.3.9394.0 - files from this build are present after updating build 9385
• 6.3.9400.0.fbl_sfs_dev1_pr.130506-2030
• 6.3.9402.0.winmain.130507-1720
• 6.3.9403.0.fbl_srv2_partners.130509-2000
• 6.3.9405.0.fbl_partner_out20.130510-2330 - files from this build are present after updating build 9385
• 6.3.9410.0.fbl_partner_out21.130522-1653
• 6.3.9415.0.fbl_partner_out22.130525-0845

Milestone Preview

• 6.3.9416.0.winmain_bluemp.130528-1832
• 6.3.9418.0.winmain.130530-1905
• 6.3.9420.0.winmain.130603-1734
• 6.3.9422.0.winmain_bluemp.130605-1735
• 6.3.9428.0.winmain_bluemp.130612-1715 - Confirmed to be fake
• 6.3.9431.0.winmain_bluemp.130615-1214 - Official Preview

Pre-RTM

• 6.3.9471.0.fbl_partner_out30.130726-2004
• 6.3.9472.0.winmain.130729-1720
• 6.3.9477.0.FBL_PARTNER_OUT31.130803-0736
• 6.3.9483.0.?.??????-????

RTM

• 6.3.9600.16384.WINBLUE_RTM.130821-1623