MC305355 – Take action: December 2021 security update available for all supported versions of Windows

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check before: 2021-12-14

Product:

Windows

Platform:

Windows Desktop, World tenant

Status:

Change type:

Admin impact

Links:

Details:

The December 2021 security update release, referred to as our "B" release, is now available for Windows 11 and all supported versions of Windows 10. We recommend that you install these updates promptly. The Release Notes associated to this update contain a new video highlight with information on the contents in this release (Release notes might publish with a delay of up to an hour after the updates are available for download). For instructions on how to install this update on your home device, check this article. To learn more about the different types of monthly quality updates, see our Windows quality updates primer.


IMPORTANT: There will be no preview, non-security “C” releases for Windows 10 or Windows 11 during the month of December. The "C" releases normally target the third week of the month. There will be a December "B" security update release, as usual.


Improvements and fixes for the Windows 11 update:


This update makes quality improvements to the servicing stack, which is the component that installs Windows updates.
Miscellaneous security improvements to internal OS functionality.


For instructions on how to install this update for your operating system, see the KB for your OS listed below:


Windows 11, version 21H1 (original release): KB5008215
Windows 10, version 21H1: KB5008212
Windows 10, version 20H2, Windows Server, version 20H2: KB5008212
Windows 10, version 20H1, Windows Server, version 20H1: KB5008212
Windows 10, version 1909, Windows Server, version 1909: KB5008212
Windows 10, version 1809, Windows Server, version 1809, Windows Server 2019: KB5008218
Windows 10, version 1607, Windows Server 2016: KB5008207
Windows 10, version 1507: KB5008230
Windows 8.1, Windows Server 2012 R2: Monthly Rollup KB5008263 / Security Only KB5008285
Windows Server 2012: Monthly Rollup: KB5008277 / Security Only KB5008255
Windows 7 Service Pack 1, Windows Server 2008 R2 Service Pack 1: Monthly Rollup KB5008244 / Security Only KB5008282
Windows Server 2008 Service Pack 2: Monthly Rollup KB5008274 / Security Only KB5008271

Change Category:
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Scope:
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Release Phase:

Created:
2022-02-11

updated:
2022-08-27

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changes*

DatePropertyoldnew
2022-09-15MC prepareps://support.microsoft.com/help/5006674
ps://support.microsoft.com/help/5008207
ps://support.microsoft.com/help/50082
ps://support.microsoft.com/help/5008215
ps://support.microsoft.com/help/5008218
ps://support.microsoft.com/help/500823
ps://support.microsoft.com/help/5008244
ps://support.microsoft.com/help/5008255
ps://support.microsoft.com/help/5008263
ps://support.microsoft.com/help/500827
ps://support.microsoft.com/help/5008274
ps://support.microsoft.com/help/5008277
ps://support.microsoft.com/help/500828
ps://support.microsoft.com/help/5008285
ps://support.microsoft.com/windows/update-windows-3c5ae7fc-9fb6-9af1-1984-b5e0412c556a#WindowsVersion=Windows_
ps://techcommunity.microsoft.com/t5/windows-it-pro-blog/windows-quality-updates-primer/ba-p/2569385
https://support.microsoft.com/help/5006674
https://support.microsoft.com/help/5008207
https://support.microsoft.com/help/5008212
https://support.microsoft.com/help/5008215
https://support.microsoft.com/help/5008218
https://support.microsoft.com/help/5008230
https://support.microsoft.com/help/5008244
https://support.microsoft.com/help/5008255
https://support.microsoft.com/help/5008263
https://support.microsoft.com/help/5008271
https://support.microsoft.com/help/5008274
https://support.microsoft.com/help/5008277
https://support.microsoft.com/help/5008282
https://support.microsoft.com/help/5008285
https://support.microsoft.com/windows/update-windows-3c5ae7fc-9fb6-9af1-1984-b5e0412c556a#WindowsVersion=Windows_11
https://techcommunity.microsoft.com/t5/windows-it-pro-blog/windows-quality-updates-primer/ba-p/2569385
2022-08-27MC preparehttps://support.microsoft.com/help/5006674
https://support.microsoft.com/help/5008207
https://support.microsoft.com/help/5008212
https://support.microsoft.com/help/5008215
https://support.microsoft.com/help/5008218
https://support.microsoft.com/help/5008230
https://support.microsoft.com/help/5008244
https://support.microsoft.com/help/5008255
https://support.microsoft.com/help/5008263
https://support.microsoft.com/help/5008271
https://support.microsoft.com/help/5008274
https://support.microsoft.com/help/5008277
https://support.microsoft.com/help/5008282
https://support.microsoft.com/help/5008285
https://support.microsoft.com/windows/update-windows-3c5ae7fc-9fb6-9af1-1984-b5e0412c556a#WindowsVersion=Windows_11
https://techcommunity.microsoft.com/t5/windows-it-pro-blog/windows-quality-updates-primer/ba-p/2569385
ps://support.microsoft.com/help/5006674
ps://support.microsoft.com/help/5008207
ps://support.microsoft.com/help/50082
ps://support.microsoft.com/help/5008215
ps://support.microsoft.com/help/5008218
ps://support.microsoft.com/help/500823
ps://support.microsoft.com/help/5008244
ps://support.microsoft.com/help/5008255
ps://support.microsoft.com/help/5008263
ps://support.microsoft.com/help/500827
ps://support.microsoft.com/help/5008274
ps://support.microsoft.com/help/5008277
ps://support.microsoft.com/help/500828
ps://support.microsoft.com/help/5008285
ps://support.microsoft.com/windows/update-windows-3c5ae7fc-9fb6-9af1-1984-b5e0412c556a#WindowsVersion=Windows_
ps://techcommunity.microsoft.com/t5/windows-it-pro-blog/windows-quality-updates-primer/ba-p/2569385

*starting April 2022

Last updated 2 months ago

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