Skip to content
WindowsAdvanced

Complete Windows 11 KB Update History: All Major Updates from 2021 to 2026 Explained

QUICK ANSWER Windows 11 has received hundreds of cumulative updates since its original release on 5 October 2021. Microsoft identifies most Windows updates w...

BI
Bison Technical Team Enterprise IT specialists
Updated 07 Sep 2026 16 min read 0 total views

QUICK ANSWER

Windows 11 has received hundreds of cumulative updates since its original release on 5 October 2021.

Microsoft identifies most Windows updates with a KB (Knowledge Base) number, such as KB5006674, KB5028185, KB5044284, KB5066835, KB5101650, KB5121003, and KB5120998.

Advertisement

The most important point is that Windows 11 cumulative updates are cumulative. You normally do not need to install every historical KB one by one. Installing the latest applicable cumulative update normally includes fixes delivered by earlier cumulative updates.

As of 7 September 2026, the Windows 11 release families relevant to the complete update history are:

Windows 11 version Main OS build
21H2 22000
22H2 22621
23H2 22631
24H2 26100
25H2 26200
26H1 28000

Windows 11 26H1 is a special newer release introduced in February 2026 and is not simply an ordinary in-place feature upgrade offered to existing 24H2/25H2 PCs. Microsoft currently lists 26H1, 25H2, 24H2 and supported editions of 23H2 in its servicing information.

This article provides a historical reference to the major Windows 11 operating-system cumulative KB releases and explains what each class of update primarily does.


COMPLETE ARTICLE

What Does KB Mean in Windows Update?

KB stands for Knowledge Base.

Microsoft assigns a Knowledge Base number to an update or support article, for example:

KB5120998

The KB number identifies the update package/documentation, while the OS Build tells you the resulting Windows build.

For example:

KB5120998 → Windows 11 24H2 build 26100.9278 / Windows 11 25H2 build 26200.9278

The same KB can therefore apply to more than one Windows 11 release.


Understanding B, D, Preview and OOB Updates

Microsoft's current servicing terminology makes the historical lists much easier to understand.

Type Meaning Main purpose
B release Second Tuesday monthly release Security + quality fixes
D release Later-month release, usually fourth week Optional non-security improvements/preview
Preview Optional preview cumulative update Tests fixes/features planned for later rollout
OOB Out-of-band Urgent fix released outside normal schedule
Feature update New Windows version Moves Windows to a newer release
Enablement package Small activation package Enables features already staged in Windows
Hotpatch Eligible enterprise servicing mechanism Security servicing with fewer required restarts

The monthly security update is normally the update ordinary users should prioritize.

Preview updates are generally optional unless you need a particular fix or want Microsoft’s newest non-security improvements before the following regular security update.


Windows 11 21H2 – Original Release

Windows 11 21H2 uses the 22000.x build family.

It was the original Windows 11 release.

2021 Windows 11 Updates

Date KB Build Primary purpose
12 Oct 2021 KB5006674 22000.258 First regular Windows 11 cumulative security update
21 Oct 2021 KB5006746 22000.282 Optional quality/compatibility fixes
9 Nov 2021 KB5007215 22000.318 November security and reliability update
22 Nov 2021 KB5007262 22000.348 Optional non-security fixes
14 Dec 2021 KB5008215 22000.376 December security and quality update

Microsoft records the original GA build as 22000.194; it did not have a normal cumulative-update KB in the release-history table.


Windows 11 Updates Released in 2022

Windows 11 21H2

Period KB Build Primary purpose
Jan B KB5009566 22000.434 Security cumulative update
Jan OOB KB5010795 22000.438 Emergency out-of-band corrections
Jan Preview KB5008353 22000.469 Optional quality fixes
Feb B KB5010386 22000.493 Security cumulative update
Feb Preview KB5010414 22000.527 Optional fixes/improvements
Mar B KB5011493 22000.556 Security update
Mar Preview KB5011563 22000.593 Non-security improvements
Apr B KB5012592 22000.613 Security update
Apr Preview KB5012643 22000.652 Optional fixes
May B KB5013943 22000.675 Security update
May Preview KB5014019 22000.708 Quality improvements
Jun B KB5014697 22000.739 Security update
Jun OOB KB5016138 22000.740 Emergency correction
Jun Preview KB5014668 22000.778 Optional fixes
Jul B KB5015814 22000.795 Security update
Jul Preview KB5015882 22000.832 Quality improvements
Aug B KB5016629 22000.856 Security update
Aug Preview KB5016691 22000.918 Optional fixes
Sep B KB5017328 22000.978 Security update
Sep Preview KB5017383 22000.1042 Optional quality update
Oct B KB5018418 22000.1098 Security update
Oct OOB KB5020387 22000.1100 Urgent correction
Oct Preview KB5018483 22000.1165 Optional fixes
Nov B KB5019961 22000.1219 Security update
Nov Preview KB5019157 22000.1281 Optional quality fixes
Dec B KB5021234 22000.1335 Security update

These releases form the main 2022 servicing history for Windows 11 21H2.


Windows 11 22H2 Arrives

Windows 11 22H2 introduced the 22621.x build family.

Its first public build was 22621.521 in September 2022.

Important early updates included:

Date/period KB Build Purpose
27 Sep 2022 KB5019311 22621.525 OOB servicing/update correction
30 Sep 2022 KB5017389 22621.608 First major 22H2 preview servicing
Oct B KB5018427 22621.674 Security update
Oct OOB KB5019509 22621.675 Feature/experience enablement and fixes
Oct Preview KB5018496 22621.755 Optional improvements
Nov B KB5019980 22621.819 Security update
Nov Preview KB5020044 22621.900 Quality improvements
Dec B KB5021255 22621.963 Security update

 


Windows 11 Updates Released in 2023

Two major Windows 11 servicing branches were active during 2023.

Windows 11 21H2 KB Updates in 2023

KB5022287, KB5019274, KB5022836, KB5022905, KB5023698, KB5023774, KB5025224, KB5025298, KB5026368, KB5026436, KB5027223, KB5027292, KB5028182, KB5028245, KB5029253, KB5029332, KB5030217, KB5030301, KB5031358, KB5032192 and KB5033369

These advanced the 22000 branch from build 22000.1455 in January to 22000.2652 in December.

The B releases primarily provided security fixes, while the C/D releases were mainly optional quality and reliability previews.

Windows 11 22H2 KB Updates in 2023

Month Security KB Preview/optional KB
January KB5022303 KB5022360
February KB5022845 KB5022913
March KB5023706 KB5023778
April KB5025239 KB5025305
May KB5026372 KB5026446
June KB5027231 KB5027303
July KB5028185 KB5028254
August KB5029263 KB5029351
September KB5030219 KB5030310
October KB5031354 KB5031455
November KB5032190 KB5032288
December KB5033375

 

Important 2023 Change: Windows 11 23H2

Windows 11 23H2 uses build 22631.

Microsoft used enablement package KB5027397 to move eligible 22H2 installations to 23H2.

This is important because 22H2 and 23H2 shared much of the same underlying servicing platform, which is why many KB numbers applied to both versions.


Windows 11 Updates Released in 2024

Major 22H2/23H2 Cumulative KBs

Month Security update Preview
Jan KB5034123 KB5034204
Feb KB5034765 KB5034848
Mar KB5035853 KB5035942
Apr KB5036893 KB5036980
May KB5037771 KB5037853
Jun KB5039212 KB5039302
Jul KB5040442 KB5040527
Aug KB5041585 KB5041587
Sep KB5043076 KB5043145
Oct KB5044285 KB5044380
Nov KB5046633 KB5046732
Dec KB5048685

These releases advanced the 22621/22631 servicing family and combined monthly security remediation with Windows reliability and feature improvements.


Windows 11 24H2 Begins

Windows 11 version 24H2 uses OS Build 26100 and became generally available in October 2024.

Important 24H2 releases in 2024 were:

Date KB Build Purpose
8 Oct KB5044284 26100.2033 First major 24H2 security cumulative update
24 Oct KB5044384 26100.2161 Optional quality improvements
12 Nov KB5046617 26100.2314 Security update
21 Nov KB5046740 26100.2454 Optional fixes
10 Dec KB5048667 26100.2605 December security update

24H2 itself introduced major platform improvements including Wi-Fi 7 support, Bluetooth LE Audio improvements, File Explorer changes, power-management improvements, Sudo for Windows and Remote Desktop improvements.


Windows 11 Updates Released in 2025

Windows 11 24H2 – Main 2025 KB History

Period KB Build Type / primary purpose
Jan B KB5050009 26100.2894 Security
Jan D KB5050094 26100.3037 Preview
Feb B KB5051987 26100.3194 Security
Feb D KB5052093 26100.3323 Preview
Mar B KB5053598 26100.3476 Security
Mar D KB5053656 26100.3624 Preview
Apr B KB5055523 26100.3775 Security
Apr D KB5055627 26100.3915 Preview
May B KB5058411 26100.4061 Security
May OOB KB5061977 26100.4066 Emergency correction
May D KB5058499 26100.4202 Preview
Jun B KB5060842 26100.4349 Security
Jun OOB KB5063060 26100.4351 Emergency correction
Jun D KB5060829 26100.4484 Preview
Jul B KB5062553 26100.4652 Security
Jul OOB KB5064489 26100.4656 Emergency correction
Jul D KB5062660 26100.4770 Preview
Aug B KB5063878 26100.4946 Security
Aug D KB5064081 26100.5074 Preview
Sep B KB5065426 26100.6584 Security
Sep OOB KB5068221 26100.6588 Emergency correction
Sep D KB5065789 26100.6725 Preview
Oct B KB5066835 26100.6899 Security
Oct OOB KB5070773 / KB5070881 26100.6901/.6905 Emergency corrections
Oct D KB5067036 26100.7019 Major preview/features
Nov B KB5068861 26100.7171 Security
Nov OOB KB5072359 26100.7178 Emergency correction
Nov D KB5070311 26100.7309 Preview
Dec B KB5072033 26100.7462 Security

Microsoft's official release table records these as the primary 24H2 cumulative servicing releases.


Windows 11 25H2

Windows 11 25H2 uses the 26200 build family.

The GA build was 26200.6584, released on 30 September 2025.

25H2 enabled several capabilities that had previously been controlled or gradually introduced in 24H2, including AI actions in File Explorer, Click to Do and Agent in Settings on compatible Copilot+ PCs. It also added Wi-Fi 7 enterprise connectivity and enterprise policy support for removing selected preinstalled Store apps.

Initial 25H2 KB Updates

Period KB Build
Oct 2025 B KB5066835 26200.6899
Oct OOB KB5070773 26200.6901
Oct D KB5067036 26200.7019
Nov B KB5068861 26200.7171
Nov D KB5070311 26200.7309
Dec B KB5072033 26200.7462

 


Windows 11 Updates Released in 2026

2026 is especially important because Microsoft is servicing several Windows 11 branches simultaneously.

Windows 11 24H2 and 25H2 – 2026

Period KB 24H2/25H2 build Purpose
Jan B KB5074109 .7623 Security baseline
Jan OOB KB5077744 .7627 Emergency fix
Jan OOB KB5078127 .7628 Additional emergency fix
Jan D KB5074105 .7705 Preview
Feb B KB5077181 .7840 Security
Feb D KB5077241 25H2 .7922 Preview
Mar B KB5079473 25H2 .8037 Security
Mar OOB KB5085516 25H2 .8039 Emergency fix
Mar D KB5079391 25H2 .8116 Preview
May B KB5089549 .8457 Security
May D KB5089573 .8524 Preview
Jun B KB5094126 .8655 Security
Jun D KB5095093 .8737 Preview
Jul B KB5101650 .8875 Security
Jul OOB KB5121767 .8894 Compatibility correction
Jul D KB5101684 .8973 Preview
Aug B KB5121003 .9168 Security
Aug D KB5120998 .9278 Latest preview as of this article

Microsoft lists KB5120998, released 27 August 2026, as build 26100.9278 for 24H2 and 26200.9278 for 25H2.


Important KB5121003 – August 2026 Security Update

KB5121003 is the August 2026 security cumulative update for Windows 11 24H2 and 25H2.

One particularly important known issue affects some ARM-based PCs.

Microsoft documents that Teams and the new Outlook for Windows might fail to start or close unexpectedly on affected ARM devices after updates released on or after this update. Updating the Auto Super Resolution Package through Microsoft Store to version 1.0.19.0 or later is Microsoft's documented workaround at the time of writing.


Important KB5101650 – July 2026

KB5101650 was the July 2026 security cumulative update.

Important changes included:

  • additional Secure Boot certificate deployment
  • fixes for some third-party applications using OLE Automation with Microsoft Office
  • networking security hardening
  • Recycle Bin fixes
  • updated Windows curl security
  • stronger Remote Desktop publisher certificate support
  • SHA-2 certificate thumbprints for trusted RDP publishers
  • beginning the move away from SHA-1
  • removal of picture-password enrollment for new configurations

Some Dell PCs using certain Intel Innovation Platform Framework components were temporarily blocked from receiving the update because of compatibility concerns.

Microsoft subsequently provided KB5121767 as an out-of-band resolution for affected devices.


KB5120998 – August 2026 Preview Update

At the time this article was updated, KB5120998 is one of the most significant recent Windows 11 preview updates.

It applies to:

  • Windows 11 24H2
  • Windows 11 25H2

Resulting builds:

  • 24H2 → 26100.9278
  • 25H2 → 26200.9278

Major changes include:

File Explorer

File Explorer Home starts faster and is more responsive.

The Recommended section also receives touch-scrolling improvements.

Administrator Protection

Microsoft continues the rollout of Administrator Protection, designed to reduce persistent administrative privilege exposure by providing just-in-time administrative privileges.

Virtual Desktops

Switching between multiple desktops becomes smoother.

Display and Graphics

Microsoft improved reliability of Display Settings and persistence of brightness settings.

Windows Update

Update restart behavior was improved so that computers manually put to sleep can return to sleep after an update finishes.

Windows Update Orchestration Platform

Participating applications can coordinate their own updates with Windows Update.

Post-Quantum Cryptography

ML-KEM can be used as a standalone algorithm for TLS key exchange in addition to previously introduced hybrid groups.

VPN Reliability

Microsoft improved recovery from certain VPN-process problems that could leave processes unresponsive.

WMIC Removed

A major administrative change begins with the August 2026 servicing period:

WMIC is no longer included with Windows 11 24H2 and 25H2.

This affects the legacy wmic.exe command-line utility, not Windows Management Instrumentation itself.

Administrators should migrate scripts to PowerShell/CIM alternatives.

For example, instead of:

wmic bios get serialnumber

use PowerShell:

Get-CimInstance Win32_BIOS | Select-Object SerialNumber

 


Known Problems with KB5120998

Microsoft currently documents several important issues.

1. Mouse Customization Can Reset

On some non-English Windows installations, customized mouse pointer/cursor settings can revert to defaults.

Microsoft says manually restoring the values might not work because the affected Windows components fail to load those settings correctly.

2. Teams and New Outlook Problems on ARM

Some ARM devices can experience failures when starting:

  • Microsoft Teams
  • new Outlook for Windows

Classic Outlook, Word and Excel are not listed as affected by this particular problem.

3. Desktop Background May Turn Black

Some PCs can lose desktop personalization settings after installing KB5120998.

Symptoms can include:

  • wallpaper replaced with black background
  • slideshow settings lost
  • other desktop personalization settings affected

Microsoft is working on fixes for these documented issues.


Windows 11 26H1 – A New Branch in 2026

Another important development is Windows 11 version 26H1, using OS Build 28000.

It became available on 10 February 2026.

Microsoft specifically notes that this release is not offered as an in-place update from Windows 11 24H2 or 25H2 on existing devices. Therefore, administrators should not treat 26H1 as simply the automatic successor every 24H2/25H2 PC should immediately install.

Windows 11 26H1 KB History Through August 2026

Period KB Build Type
Feb B KB5077179 28000.1575 Security
Feb D KB5077239 28000.1643 Preview
Mar B KB5079466 28000.1719 Security
Mar D KB5079489 28000.1764 Preview
Apr B KB5083768 28000.1836 Security
Apr D KB5083806 28000.1896 Preview
May B KB5089548 28000.2113 Security
May D KB5089570 28000.2179 Preview
Jun B KB5095051 28000.2269 Security
Jun D KB5095091 28000.2340 Preview
Jul B KB5101649 28000.2525 Security
Jul D KB5101681 28000.2608 Preview
Aug B KB5121000 28000.2704 Security
Aug D KB5120996 28000.2804 Preview

 


Windows 11 23H2 – Final Servicing Period

Windows 11 23H2 Enterprise/Education remains relevant in 2026 even though consumer editions have already reached end of servicing.

Important 2026 23H2 security releases include:

Month KB Build
Jan KB5073455 22631.6491
Jan OOB KB5077797 22631.6494
Jan OOB KB5078132 22631.6495
Feb KB5075941 22631.6649
Mar KB5078883 22631.6783
Apr KB5082052 22631.6936
May KB5087420 22631.7079
Jun KB5093998 22631.7219
Jul KB5099414 22631.7376
Aug KB5120240 22631.7517

Microsoft's current servicing table lists Enterprise/Education 23H2 support through 10 November 2026.


Important: Why Are There So Many Different Windows 11 KB Numbers?

A PC does not receive every KB listed in this article.

The KB you receive depends on:

  • Windows 11 version
  • edition
  • CPU architecture
  • installed components
  • device eligibility
  • enterprise servicing configuration
  • update channel
  • whether optional preview updates are enabled
  • safeguard holds
  • hardware/driver compatibility

For example, a 24H2 PC and a 23H2 PC can receive completely different KB numbers in the same month.


Does the Latest KB Include Older KB Updates?

For normal cumulative Windows updates, yes.

Suppose the servicing sequence is:

KB-A → KB-B → KB-C → KB-D

A newly installed Windows PC normally does not need A, B and C manually installed before D.

The latest cumulative update contains applicable earlier fixes.

Microsoft explicitly describes Windows servicing this way: installing the latest update ensures that previous updates and important security fixes are included.

This is one of the most important concepts for administrators troubleshooting Windows Update.


Security Update vs Preview Update

Monthly Security Update

Normally released on the second Tuesday of the month.

It generally contains:

  • security vulnerability fixes
  • quality improvements
  • previous cumulative fixes
  • applicable improvements tested in earlier preview updates

For most users and organizations:

Install these updates.

Preview / D Release

Usually released later in the month.

It commonly contains:

  • upcoming fixes
  • reliability improvements
  • UI changes
  • new functionality
  • performance improvements
  • fixes planned for inclusion in a future security update

For production systems:

Installation is usually optional unless you specifically need one of the fixes.


Should You Uninstall a Problematic KB?

Only when there is a genuine problem and Microsoft or your own testing indicates the update is responsible.

Before uninstalling an update:

  1. Identify the exact KB.
  2. Check your Windows version.
  3. Check the OS build.
  4. Review Microsoft's known-issues documentation.
  5. Check whether Microsoft has released an OOB or newer cumulative update.
  6. Back up important data.
  7. Prefer installing Microsoft's corrected update instead of permanently blocking security servicing.

Removing security updates can re-expose vulnerabilities.


How to Check Which Windows 11 KB Updates Are Installed

Open:

Settings → Windows Update → Update history

You can see categories such as:

  • Quality Updates
  • Driver Updates
  • Definition Updates
  • Other Updates

You can also use PowerShell:

Get-HotFix

To search for a particular KB:

Get-HotFix -Id KB5121003

Not every modern Windows servicing component is necessarily represented by Get-HotFix, so Settings, DISM and servicing-package information can provide additional detail.


Check Windows Version and Build

Press:

Windows + R

Enter:

winver

You might see something similar to:

Version 25H2 (OS Build 26200.9278)

This information is often more useful than saying only "Windows 11."

When troubleshooting an update, always record:

Windows version + OS build + KB number


Check Installed Packages with DISM

Open Command Prompt as Administrator and run:

DISM /Online /Get-Packages

To filter output for KB packages:

DISM /Online /Get-Packages | findstr KB

DISM can reveal servicing packages that may not appear exactly as expected through older update-query methods.


Can You Manually Download a Windows KB?

Yes.

Microsoft provides standalone packages through the Microsoft Update Catalog.

Before downloading, verify:

  • KB number
  • Windows version
  • architecture: x64 or ARM64
  • package applicability

Do not install a package simply because its KB number looks newer.

A package intended for another Windows build might not apply to your computer.


Why a KB May Not Appear on Your PC

Common reasons include:

Wrong Windows version

A 23H2 KB may not apply to 24H2.

Update already superseded

A newer cumulative update might already contain it.

Update not applicable

Your hardware, architecture or Windows configuration may not require the package.

Preview update

Optional previews might not install automatically.

Safeguard hold

Microsoft can temporarily prevent an update or feature release from reaching devices with known compatibility problems.

Enterprise policy

WSUS, Windows Update for Business, Intune or Group Policy may control deployment.


Historical Windows 11 Build Families at a Glance

Version Build family General period
Windows 11 21H2 22000.x 2021 onward; now legacy
Windows 11 22H2 22621.x 2022 onward; now end of updates
Windows 11 23H2 22631.x 2023 onward
Windows 11 24H2 26100.x 2024 onward
Windows 11 25H2 26200.x 2025 onward
Windows 11 26H1 28000.x 2026 onward

Microsoft's current release-information page should always be treated as the authoritative reference for the newest build and KB because the table changes whenever a new cumulative, preview or out-of-band update is released.


FAQ

What was the first Windows 11 cumulative KB update?

The first regular cumulative security update after Windows 11's general availability was KB5006674, released on 12 October 2021, which brought the original Windows 11 branch to build 22000.258.

What is the latest Windows 11 KB as of 7 September 2026?

For Windows 11 24H2/25H2, the latest general cumulative release documented before this article's publication date is the 27 August 2026 preview KB5120998, resulting in builds 26100.9278 and 26200.9278.

The corresponding August security update was KB5121003, released on 11 August 2026.

For Windows 11 26H1, the corresponding August preview is KB5120996, build 28000.2804.

Is KB5120998 a mandatory security update?

No. KB5120998 is a non-security preview cumulative update. It contains production-quality fixes and feature improvements, but it is not the regular monthly security release.

Do I have to install every KB since 2021?

No. Windows cumulative updates contain applicable fixes from earlier cumulative releases.

Why do Windows 11 24H2 and 25H2 sometimes have the same KB?

The two versions share substantial servicing content. Microsoft can therefore publish one cumulative package/KB while producing different OS build numbers for each Windows version.

Why does Windows 11 23H2 use build 22631 while 22H2 uses 22621?

23H2 was built on the same servicing foundation and was enabled through an enablement package, which changed the build family from 22621 to 22631.

What is KB5027397?

KB5027397 is the enablement package used to activate Windows 11 version 23H2 on eligible 22H2 systems.

What does OOB mean?

Out-of-band. It is an update Microsoft releases outside its normal monthly schedule, generally because a problem needs a faster correction.

Should I install Windows preview KB updates?

For ordinary production PCs, they are usually unnecessary unless you need a particular fix or intentionally want early access to the improvements. Regular monthly security updates should receive higher priority.

Can a Windows KB cause problems?

Yes. Even thoroughly tested cumulative updates can expose compatibility problems involving particular drivers, applications, languages, configurations or hardware. Microsoft therefore maintains known-issue and release-health documentation.

Can I uninstall a Windows KB?

Some cumulative updates can be uninstalled through Windows Update's recovery/uninstall options, but removal should generally be a troubleshooting measure rather than a normal practice.

How do I find the KB responsible for a problem?

Record:

  1. Windows version
  2. OS build
  3. installation date
  4. recently installed KB
  5. error message or symptom

Then compare the timing of the problem with Microsoft's update release notes and known issues.

Is WMIC removed because of a KB?

Microsoft has been deprecating WMIC for years. Beginning with the August 2026 servicing period for Windows 11 24H2/25H2, the WMIC command-line utility is no longer included/available as before. WMI itself remains supported.

What is the difference between KB number and OS build?

The KB number identifies the update, while the OS build identifies the resulting Windows operating-system revision.

For example:

KB5120998 → Windows 11 25H2 → OS Build 26200.9278

Where should administrators verify the newest Windows 11 KB?

Use Microsoft's official Windows 11 Release Information, Windows Update History, Windows Release Health, and Microsoft Update Catalog resources.


FINAL RECOMMENDATION / CONCLUSION

Windows 11's update history is much easier to understand when KB numbers are viewed together with the Windows version and OS build.

Do not identify a Windows installation only as "Windows 11."

For troubleshooting and support, record it as something similar to:

Windows 11 25H2 – Build 26200.9278 – KB5120998

That immediately tells an administrator which Windows servicing branch and cumulative update is installed.

For normal business and home PCs, prioritize Microsoft's regular monthly security cumulative updates. Treat Preview/D releases as optional, unless they contain a fix you specifically require. Treat OOB updates as important corrective releases and review their applicability when Microsoft publishes one for a problem affecting your environment.

Most importantly, you do not need to install every KB in this historical list. Windows cumulative servicing means that the latest applicable cumulative update normally incorporates fixes from previous cumulative updates.

Because Microsoft continuously revises Windows servicing information, this article should be periodically updated whenever a new monthly Windows 11 cumulative update is released.

 

#Windows11 #WindowsUpdate #Windows11Updates #WindowsKB #KBUpdates #Windows11KB #UpdateHistory #WindowsUpdateHistory #CumulativeUpdate #SecurityUpdate #PatchTuesday #WindowsSecurity #Windows11Security #PreviewUpdate #OptionalUpdate #OutOfBandUpdate #OOBUpdate #Windows11_21H2 #Windows11_22H2 #Windows11_23H2 #Windows11_24H2 #Windows11_25H2 #Windows11_26H1 #KB5120998 #KB5121003 #KB5101650 #KB5101684 #KB5094126 #KB5066835 #KB5067036 #KB5050009 #KB5044284 #KB5034123 #KB5028185 #KB5006674 #WindowsBuild #OSBuild #MicrosoftUpdate #MicrosoftWindows #WindowsTroubleshooting #WindowsAdmin #WindowsAdministrator #SysAdmin #ITSupport #WindowsSupport #WindowsTips #WindowsUpdates2026 #WindowsKnowledgeBase #MicrosoftKB #WindowsServicing

YOUR FEEDBACK

Was this guide useful?

Your answer helps us keep BISONKB accurate and practical.

THE BISON BRIEF

Practical IT knowledge, once a week.

New troubleshooting guides, scripts and infrastructure notes. No noise.

By subscribing, you agree to our privacy policy.