Windows 8.1

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Windows 8.1
Version of Microsoft Windows
Windows81-RTM-Desktop.png
OS familyWindows NT
Version6.3
CodenameBlue
Preliminary name
Architecturex86, x64
Latest build
Release date2013-10-17
Support end2023-01-10
Replaces
Windows 8
Replaced by
Windows 10

Windows 8.1 is an operating system by Microsoft. It is a free upgrade for existing Windows 8 users. It reintroduces many of the features that users missed in Windows 8, such as the Start button (although it still leads to the start screen). It replaced Windows 8 and has been succeeded by Windows 10 in late July 2015.

Builds[edit | edit source]

Milestone 1[edit | edit source]

Fake build 9622
Unconfirmed build 9220
Fake build 9289.fbl_srv_wdacxml.121220-????
Confirmed build 9296.0.winmain.130109-1730
Confirmed build 9299.0.fbl_partner_out06.130117-1707
Confirmed build 9319.0.winmain.130208-1820
Confirmed build 9326.0.fbl_uip_dev2.130225-2000
Confirmed build 9345.0.winmain_bluem1.130218-1736
Unconfirmed build 9347.0.winmain_bluem1.130220-1500
Confirmed build 9353.0.winmain.130228-1837
Confirmed build 9360.0.winmain.130311-1741
Confirmed build 9364.0.fbl_partner_out13.130315-2105
Confirmed build 9366.0.winmain.130319-1625
Confirmed build 9369.0.fbl_partner_out14.130324-1300

Milestone 2[edit | edit source]

Confirmed build 9373.0.winmain.130328-1740
Confirmed build 9374.0.fbl_partner_out15.130329-2355
Fake build 9375.fbl_partner_out14.130328-1742
Confirmed build 9379.0.winmain.130405-1725
Confirmed build 9379.0.fbl_partner_out16.130410-0711
Confirmed build 9385.0.fbl_partner_out17.130415-2049
Confirmed build 9385.3.fbl_uip_dev2.130326-0847
Confirmed build 9388.0.fbl_inx.130417-2217
Fake build 9388.fbl_partner_out18.130429-2155
Confirmed build 9389.0.fbl_inx_ace.130421-1800
Confirmed build 9390.0.winmain.130419-1743
Confirmed build 9391.3.fbl_partner_out18.130426-2000
Confirmed build 9397.0.winmain.130430-1805
Unconfirmed build 9403.fbl.srv2_partners.130509-2000
Fake build 9404.133.winmain_winbu3.130805-1733
Confirmed build 9405.0.winmain.130510-1737
Confirmed build 9405.0.fbl_partner_out20.130510-2330
Confirmed build 9410.fbl_partner_out21.130522-1653

Milestone Preview[edit | edit source]

Confirmed build 9411.0.winmain_bluemp.130522-1817
Confirmed build 9415.0.winmain.130524-1723
Unconfirmed build 9415.fbl_partner_out22.130525-0845
Confirmed build 9416.0.winmain_bluemp.130528-1832
Unconfirmed build 9418.0.winmain_bluemp.130530-1905
Confirmed build 9419.0.winmain_bluemp.130601-1154
Unconfirmed build 9419.0.fbl_partner_out23.130603-1634
Confirmed build 9421.0.winmain_bluemp.130604-1750
Confirmed build 9422.0.winmain_bluemp.130605-1735
Confirmed build 9428.0.winmain_bluemp.130612-1715
Confirmed build 9431.0.winmain_bluemp.130615-1214

Pre-RTM[edit | edit source]

Confirmed build 9448.0.winmain.130621-1710
Confirmed build 9448.fbl_partner_out25.130621-2030
Confirmed build 9450.0.winmain.130625-1705
Unconfirmed build 9456.fbl_partner_out27.130703-2335
Confirmed build 9457.0.fbl_loc.130708-1930
Confirmed build 9460.0.winmain.130711-1808
Confirmed build 9460.0.winblue_rtm.130715-1059
Confirmed build 9460.0.fbl_partner_out28.130712-1918
Confirmed build 9461.0.winmain.130715-1732
Confirmed build 9465.0.fbl_partner_out29.130719-2136
Unconfirmed build 9468.0.winblue_rtm.130725-1203
Confirmed build 9471.fbl_partner_out30.130726-2004
Confirmed build 9471.0.winblue_rtm.130729-1022
Confirmed build 9472.0.winmain.130729-1720
Confirmed build 9477.fbl_partner_out31.130803-0736

RTM Escrow[edit | edit source]

Confirmed build 9478.0.winblue_rtm.130804-1505
Unconfirmed build 9481.0.winblue_rtm.13080?-????
Confirmed build 9483.0.winblue_rtm.130809-2020
Confirmed build 9484.0.winblue_rtm.130812-1706
Confirmed build 9489.0.winblue_rtm.130817-1357
Unconfirmed build 9490

RTM[edit | edit source]

Confirmed build 9600.16384.winblue_rtm.130821-1623
Fake build 9600.16384.winblue_rtm.130822-2140

Post-RTM[edit | edit source]

Confirmed build 9600.fbl_uex_drx.130826-1600

GA Update[edit | edit source]

Confirmed build 9600.16404.winblue_gdr.130913-2141
Confirmed build 9600.16422.winblue_gdr.131006-1505

Spring 2014 Update pre-release[edit | edit source]

Unconfirmed build 9600.16581.winblues14_gdr_lean.131222-2030
Confirmed build 9600.16596.winblues14_gdr_lean.140114-0237
Unconfirmed build 9600.16606.winblues14_gdr_lean.140126-2042
Unconfirmed build 9600.16608.winblues14_gdr_lean.140130-2030
Confirmed build 9600.16610.winblue_s14.140201-1007
Confirmed build 9600.17018.winblue_gdr.140204-1946
Confirmed build 9600.17019.winblue_gdr.140205-2003
Confirmed build 9600.17024.winblue_gdr_s14sku_partner.140214-1700
Confirmed build 9600.17025.winblue_gdr.140214-1706

Spring 2014 Update[edit | edit source]

Confirmed build 9600.17031.winblue_gdr.140221-1952
Confirmed build 9600.17041.winblue_gdr.140305-1710
Confirmed build 9600.17238.winblue_gdr.140723-2018
Confirmed build 9600.17328.winblue_r3.140827-1500
Confirmed build 9600.17415.winblue_r4.141028-1500
Confirmed build 9600.17476.winblue_r5.141029-1500
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