Microsoft Windows 8.1

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General information

Codename	Blue
Kernel	WinNT6.3
Architectures	x64, x86
Languages	Arabic Bulgarian Chinese Hong Kong SAR Chinese Simplified Chinese Taiwan Croatian Czech Danish Dutch English English United Kingdom Estonian Finnish French German Greek Hebrew Hungarian Italian Japanese Korean Latvian Lithuanian Norwegian Bokmål Polish Portuguese Brazil Portuguese Portugal Romanian Russian Serbian Latin Slovak Slovenian Spanish Swedish Thai Turkish Ukrainian
Release date	13/11/2013
Support date	09/01/2018
Extended date	10/01/2023
SKUs	China Core Core Connected Core Connected Country Specific Core Connected Single Language Core N Enterprise Pro Pro Check/Debug Pro for Education Pro K Pro with Media Center Single Language
Replaces	Microsoft Windows 8
Replaced	Microsoft Windows 10

Buildlist (44)

Milestone 1 13

	6.2.9271.0
	6.2.9278.0
	6.2.9282.0
	6.2.9286.0
	6.2.9293.0
	6.2.9298.0
	6.2.9299.0 (fbl_partner_out06.130114-1719)
	6.2.9299.0 (fbl_partner_out06.130117-1707)
	6.2.9304.0
	6.2.9309.0
	6.3.9347.0
	6.3.9364.0
	6.3.9369.0

Milestone 2 6

	6.3.9370.0
	6.3.9374.0
	6.3.9385.0
	6.3.9389.0
	6.3.9390.0
	6.3.9415.0

Milestone Preview 3

	6.3.9419.0
	6.3.9425.0
	6.3.9431.0

Pre-Release To Manufacturing 9

	6.3.9448.0
	6.3.9452.0
	6.3.9456.0 (fbl_partner_out27)
	6.3.9457.0
	6.3.9465.0
	6.3.9471.0
	6.3.9477.0
	6.3.9483.0
	6.3.9491.0

Release To Manufacturing 2

	6.3.9600.16384 (winblue_rtm)
	6.3.9600.16384 (winblue_rtm_partner)

Windows 8.1 General Availability Update 2

	6.3.9600.16404 (IR1)
	6.3.9600.16422 (IR2)

Windows 8.1 Update Pre-Release 6

	6.3.9600.16596
	6.3.9600.16601
	6.3.9600.16610
	6.3.9600.17019
	6.3.9600.17024
	6.3.9600.17025

Windows 8.1 Update 3

	6.3.9600.17031 (IR3)
	6.3.9600.17238 (IR4)
	6.3.9600.17415 (IR5)