What is Windows 8.1?
{{Infobox OS version | name = Windows 8.1 | version of = [[Windows NT]] | logo = Windows 8 logo and wordmark.svg<!--There is NO AUTHENTIC OFFICIAL LOGO of Windows 8.1!--> | screenshot = File:20150214-20150219최광모C36.JPG | caption = Windows 8.1 running on a desktop. | developer = [[Microsoft]] | family = [[Microsoft Windows]] | source_model = {{ubl | [[Proprietary software|Closed-source]] | [[Source-available software|Source-available]] (through [[Shared Source Initiative]]) }} | license = [[Trialware]], [[Microsoft Software Assurance]], [[msdn subscription|MSDN subscription]], [[Microsoft Imagine]] | website = {{URL|https://www.microsoft.com/windows}} | supported_platforms = [[IA-32]], [[x64]] | kernel_type = [[Hybrid kernel|Hybrid]] | updatemodel = [[Windows Update]], [[Windows Store]], [[Windows Server Update Services]] | RTM_date = {{Start date and age|2013|8|27}}<ref>{{cite web |last1=Bott |first1=Ed |title=Why is Microsoft keeping the final release of Windows 8.1 secret? |url=http://www.zdnet.com/article/why-is-microsoft-keeping-the-final-release-of-windows-8-1-secret/ |website=[[ZDNet]] |publisher=[[CBS Interactive]] |date=28 August 2013}}</ref> | GA_date = {{Start date and age|2013|10|17}}<ref>{{cite web |last1=LeBlanc |first1=Brandon |title=Windows 8.1 now available! |url=https://blogs.windows.com/windowsexperience/2013/10/17/windows-8-1-now-available/ |website=Windows Experience Blog |publisher=Microsoft |date=17 October 2013}}</ref> | release_version = 6.3.9600 with January 10, 2023 update rollup | release_date = {{Start date and age|2023|01|10}} | preview_version = | preceded_by = [[Windows 8]] (2012) | succeeded_by = [[Windows 10]] (2015) | support_status = ''All editions except [[Windows Embedded 8.1 Industry]]:'' {{Plainlist| * Mainstream support ended on January 9, 2018 * Extended support ended January 10, 2023 }}<br /> ''[[Windows Embedded 8.1 Industry]]:'' {{Plainlist| * Mainstream support ended on July 10, 2018<ref name=embedded-life>{{cite web|title=Product lifecycle Windows 8.1 Industry|