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Windows OS Update Tracker

Our simplified Windows OS update tracker covers the full changelog of major and minor feature releases for Windows 11. This list does not include beta or preview builds, and is updated every time Microsoft ships a new stable release. Tap any dropdown to explore the detailed list of changes in each update.

Windows 11 26H1

September 2026 Patch Tuesday

KB5124012 / Build 28000.2954Sep 8 2026
  • SECURITY
    Core OS:September 2026 cumulative security update for Windows 11 version 26H1.
  • UPDATE
    Build:Raises the OS build to 28000.2954.

August 2026 Patch Tuesday

KB5121000 / Build 28000.2704Aug 11 2026
  • SECURITY
    Core OS:August 2026 cumulative security update for Windows 11 version 26H1.
  • UPDATE
    Build:Raises the OS build to 28000.2704.

July 2026 Patch Tuesday

KB5101649 / Build 28000.2525Jul 14 2026
  • SECURITY
    Core OS:July 2026 cumulative security update for Windows 11 version 26H1.
  • UPDATE
    Build:Raises the OS build to 28000.2525.

General Availability

Windows 11 26H1Feb 10 2026
  • NEW
    Release:Windows 11 version 26H1 became generally available on February 10, 2026.

Windows 11 24H2 / 25H2

September 2026 Patch Tuesday

KB5124008 / Builds 26200.9445 & 26100.9445Sep 8 2026
  • SECURITY
    Core OS:September 2026 cumulative security update for Windows 11 versions 25H2 and 24H2.
  • FIX
    Apps:Fixed Microsoft Teams and the new Outlook failing to launch or closing unexpectedly on some Arm-based PCs after an August security update.
  • UPDATE
    Build:Raises the OS builds to 26200.9445 and 26100.9445.

August 2026 Patch Tuesday

KB5121003 / Builds 26200.9168 & 26100.9168Aug 11 2026
  • SECURITY
    Core OS:August 2026 cumulative security update for Windows 11 versions 25H2 and 24H2.
  • UPDATE
    Build:Raises the OS builds to 26200.9168 and 26100.9168.

July 2026 Patch Tuesday

KB5101650 / Builds 26200.8875 & 26100.8875Jul 14 2026
  • SECURITY
    Core OS:July 2026 cumulative security update for Windows 11 versions 25H2 and 24H2.
  • UPDATE
    Build:Raises the OS builds to 26200.8875 and 26100.8875.

June 2026 Patch Tuesday

KB5094126 / Builds 26200.8655 & 26100.8655Jun 9 2026
  • SECURITY
    Core OS:Patched 208 security vulnerabilities this month: 38 rated Critical and the rest Important
  • NEW
    Audio:Shared Audio: two people with Bluetooth LE Audio accessories can listen to the same audio together, toggled from the Quick Settings panel
  • NEW
    Performance:New Low Latency Profile speeds up app launches and core shell experiences including the Start menu, Search, and Action Center
  • NEW
    Camera:Multiple Windows apps can now access the same camera stream simultaneously
  • NEW
    AI / Copilot+:Updated on-device AI components (Image Search, Content Extraction, Semantic Analysis, Settings Model) to version 1.2605.856.0 on Copilot+ PCs
  • FIX
    Virtualization:Fixed HYPERVISOR_ERROR (0x20001) and KMODE_EXCEPTION_NOT_HANDLED (0x1E) Stop errors that could occur after KB5089573 during restarts, virtual machine operations, or certain games
  • SECURITY
    Secure Boot:Expanded high-confidence device targeting so more eligible devices automatically receive the new Secure Boot certificates (previous ones expire June 2026); rollout remains phased
  • SECURITY
    File Explorer:Hardened how Windows processes desktop.ini files; remote folders may lose custom icons or localized names, though folder access is unaffected

May 2026 Patch Tuesday

KB5089549 / Builds 26200.8457 & 26100.8457May 12 2026
  • SECURITY
    Core OS:Patched 137 vulnerabilities across Windows and related software, including critical remote code execution and elevation of privilege flaws
  • NEW
    Gaming:Xbox mode reaches the stable channel: a full-screen, console-style experience that replaces Game mode and runs fewer background processes
  • NEW
    File Explorer:Native extraction for .uu, .cpio, .xar, and NuGet (.nupkg) archives now ships in the stable release
  • FIX
    Performance:Fixed a Delivery Optimization memory leak that caused unexpectedly high RAM usage
  • FIX
    Install:Resolved 0x80070057, 0x80240008, and 0x80073d28 errors when installing applications
  • FIX
    Networking:Improved Simple Service Discovery Protocol (SSDP) reliability so the service no longer becomes unresponsive
  • SECURITY
    Secure Boot:Expanded high-confidence device targeting so more eligible devices automatically receive the new Secure Boot certificates

April 2026 Preview Update

KB5083631 / Builds 26100.8328 & 26200.8328Apr 30 2026
  • NEW
    Gaming:Xbox Mode: new full-screen console-style gaming interface accessible via Xbox app, Game Bar, or Win+F11; optimized for controller use on PCs, laptops, and tablets
  • NEW
    File Explorer:Support for additional archive formats: .uu, .cpio, .xar, and NuGet (.nupkg) packages
  • NEW
    File Explorer:View and sort preferences now persist for common folders regardless of how they are opened
  • FIX
    File Explorer:Removed white flash when opening 'This PC' in dark mode; improved explorer.exe reliability after window closures and taskbar interactions
  • NEW
    Storage:FAT32 formatting limit raised from 32 GB to 2 TB
  • NEW
    Input:Haptic feedback support for compatible styluses (Surface Slim Pen 2, ASUS Pen 3.0, MSI Pen 2) during snap-to-grid alignment in apps
  • NEW
    Taskbar:New Agents on Taskbar: shows live progress of third-party agent tasks (first: Microsoft 365 Copilot Researcher)
  • NEW
    Taskbar:Drop Tray refined: smaller peek view to prevent accidental activation; moved to System settings
  • SECURITY
    Batch Files:New LockBatchFilesWhenInUse registry key for IT admins to prevent batch files from being modified while executing
  • FIX
    Remote Desktop:Fixed RDP connection dialog rendering issues on multi-monitor setups with different DPI scaling (regression from April 14 Patch Tuesday)
  • NEW
    Performance:Improved startup app launch performance; reduced Delivery Optimization memory usage; storage performance improvements for large volumes

April 2026 Patch Tuesday

KB5083769 / Builds 26100.8246 & 26200.8246Apr 14 2026
  • SECURITY
    Zero-Day:CVE-2026-32201: Microsoft SharePoint Server spoofing vulnerability, actively exploited in the wild before patch; CISA added to KEV catalog
  • SECURITY
    Zero-Day:CVE-2026-33825 ('BlueHammer'): Defender Antimalware Platform Elevation of Privilege, publicly disclosed before patch; exploit code was published
  • SECURITY
    Core OS:Patched ~163–167 CVEs total; 8 rated Critical (7 Remote Code Execution, 1 Denial of Service)
  • SECURITY
    Remote Desktop:RDP phishing protection: one-time security warning now shown before connecting via .rdp files; all connection settings displayed before proceeding
  • SECURITY
    Kernel Drivers:Added psmounterex.sys to vulnerable driver blocklist (CVE-2023-43896); intentionally breaks image-mount features in Macrium Reflect, Acronis Cyber Protect, and similar backup tools; update backup software to resolve
  • SECURITY
    Secure Boot:Removal of trust for kernel drivers signed by deprecated cross-signed root certificates; Windows Security now shows Secure Boot certificate update status badges
  • NEW
    Security:Smart App Control can now be toggled on or off in Settings > Windows Security without requiring a clean OS reinstall
  • NEW
    Narrator:Rich image descriptions on Copilot+ PCs; Narrator now works with Copilot on all Windows 11 devices via Narrator key + Ctrl + D
  • FIX
    BitLocker:Fixed unexpected BitLocker recovery prompts triggered after Secure Boot certificate updates on devices with PCR7 validation policies
  • FIX
    Network:Improved SMB compression over QUIC reliability; reduced connection timeouts

March 2026 Out-of-Band Update

KB5086672 / Build 26100.8117Mar 31 2026
  • FIX
    Windows Update:Fixed critical setup error (0x80073712) that blocked some devices from installing KB5079391

March 2026 Preview Update

KB5079391 / Builds 26100.8116 & 26200.8116Mar 26 2026
  • NEW
    Settings:Improved reliability and performance of opening the Home page in Settings
  • NEW
    Settings:Improved reliability of downloading required updates from Settings > System > Advanced
  • NEW
    File Explorer:Improved unblocking of files downloaded from the internet for preview in File Explorer
  • NEW
    File Explorer:Voice Typing (Win+H) now works when renaming a file in File Explorer
  • NEW
    File Explorer:Sort permissions entries by Principal in Advanced Security Settings window for folders
  • NEW
    Display:Display reliability improvements; monitors can now report refresh rates higher than 1000 Hz
  • FIX
    ARM64:Improved stability of x64 apps running on ARM64 devices in Windows Recovery Environment (WinRE)
  • FIX
    Windows Update:Fixed: WUSA (Windows Update Standalone Installer) failing with ERROR_BAD_PATHNAME on Windows 11 25H2
  • NEW
    Recovery:Quick Machine Recovery auto-enabled for Windows 11 Pro non-domain-joined devices
  • NEW
    Network:Built-in network speed test now accessible directly from the taskbar
  • NEW
    Camera:Pan and tilt control for supported cameras added in Settings app
  • NEW
    Search:Taskbar search now shows preview results on hover with group headers
  • NEW
    Security:Smart App Control can now be toggled on/off without a clean OS reinstall
  • NEW
    Settings:Settings > About page redesigned with clearer device specs and navigation

March 2026 Patch Tuesday

KB5079473Mar 10 2026
  • NEW
    Management:Windows Autopatch update readiness now generally available for enterprise IT admins
  • NEW
    Management:RSAT (Remote Server Administration Tools) now officially supported on Arm-based Windows 11 PCs
  • SECURITY
    Secure Boot:New PowerShell cmdlets: Get-SecureBootUEFI -Decoded and Get-SecureBootSVN for Secure Boot management
  • NEW
    Print:Universal inbox-class IPP/Mopria print driver replaces device-specific print drivers
  • SECURITY
    System Monitor:Native Sysmon (System Monitor) threat detection now built into Windows - no separate download needed
  • SECURITY
    WDS:Windows Deployment Services hardening for CVE-2026-0386 (Phase 2)

January 2026 Preview Update

KB5074105 / Builds 26100.7705 & 26200.7705Jan 29 2026
  • NEW
    Cross Device:Expanded Cross Device Resume features (resume Android app activity on PC)
  • NEW
    Audio:Windows MIDI Services upgraded with new capabilities
  • NEW
    Security:Smart App Control can now be disabled without requiring a full OS reinstall
  • NEW
    Biometrics:Windows Hello Enhanced Sign-in Security (ESS) now supports peripheral (external) fingerprint sensors
  • FIX
    Start Menu:Fixes for Start menu reliability and display issues
  • FIX
    Kiosk Mode:Fixes for Kiosk mode stability
  • FIX
    Lock Screen:Lock screen display and reliability fixes
  • FIX
    File Explorer:Multiple File Explorer fixes and improvements
  • FIX
    Activation:Windows Activation reliability fixes
  • FIX
    Input:Input handling and Desktop icons bug fixes

January 2026 Patch Tuesday

KB5074109 / Builds 26100.7623 & 26200.7623Jan 13 2026
  • SECURITY
    Core OS:Fixed 112-114 security vulnerabilities including ~8 Critical and at least 1 actively exploited zero-day
  • SECURITY
    Secure Boot:New Secure Boot certificates issued (previous ones expired; failure to update increases boot vulnerability)
  • NEW
    Taskbar:Gradual rollout of colorful battery icons on the taskbar
  • NEW
    Taskbar:Share with Copilot button on taskbar continued rollout (started Dec 2025)

25H2 Preview

KB5064081 / Build 26200Aug 29 2025
  • SECURITY
    Authentication:Machine ID now tied to secure hardware for stronger device identity verification

2024 Update (24H2) Launch

Build 26100Oct 1 2024
  • NEW
    LTSC:First Windows 11-based Long-Term Servicing Channel (LTSC) editions introduced
  • NEW
    AI / Copilot+:Copilot+ PC features enabled: Recall, Cocreator in Paint, Live Captions translation
  • NEW
    AI:Windows Search powered by semantic/AI indexing on Copilot+ PCs
  • NEW
    Accessibility:Improvements to voice access and natural language commands
  • NEW
    Settings:Redesigned Settings pages for better navigation
  • SECURITY
    IoT Enterprise:New subscription variants for IoT Enterprise editions (LTSC and non-LTSC)
  • NEW
    Energy:Improved energy efficiency and power management options

Windows 11 23H2

September 2026 Patch Tuesday (23H2)

KB5122880 / Build 22631.7582Sep 8 2026
  • SECURITY
    Core OS:Monthly security rollup covering the same September 2026 vulnerabilities patched on 24H2/25H2

June 2026 Patch Tuesday (23H2)

KB5093998 / Build 22631.7219Jun 9 2026
  • SECURITY
    Core OS:Monthly security rollup covering the same June 2026 vulnerabilities patched on 24H2/25H2
  • SECURITY
    Secure Boot:Expanded device targeting for the new Secure Boot certificates ahead of the June 2026 expiry of the previous ones
  • SECURITY
    File Explorer:Same desktop.ini processing hardening; remote folders may lose custom icons or localized names

April 2026 Patch Tuesday (23H2)

KB5082052 / Build 22631.6936Apr 14 2026
  • SECURITY
    Zero-Day:Same CVE-2026-32201 (SharePoint spoofing) and CVE-2026-33825 (Defender EoP) zero-days patched as 24H2/25H2
  • SECURITY
    Remote Desktop:RDP phishing protection: security warning now shown before connecting via .rdp files; all settings displayed before proceeding
  • FIX
    Sign-in:Resolved false 'no internet connection' errors that blocked Microsoft account sign-in and Teams after the March 10 update
  • SECURITY
    Kernel Drivers:Same psmounterex.sys driver block (CVE-2023-43896); affects backup tools like Macrium Reflect and Acronis on 23H2 as well

March 2026 Patch Tuesday (23H2)

KB5078883 / Build 22631.6783Mar 10 2026
  • SECURITY
    Secure Boot:Secure Boot management improvements and improved File History reliability
  • FIX
    GPU:GPU stability and reliability improvements
  • NEW
    Localization:Added new Saudi Riyal currency symbol support

Moment 5 / KB5034848

Build 22631.3235Feb 29 2024
  • NEW
    AI:Improvements to Copilot in Windows experience
  • NEW
    Accessibility:New voice access in French, German, and Spanish languages
  • NEW
    Accessibility:Multi-display support added to voice access
  • NEW
    Accessibility:New voice shortcuts feature
  • NEW
    Accessibility:Enhanced image consumption experience in Narrator
  • NEW
    Share Window:New share targets for links in Windows share window
  • NEW
    Quick Settings:Updates to the Cast flyout in Quick Settings
  • NEW
    Snap Layouts:New suggestions feature in snap layouts
  • NEW
    Snipping Tool:Notification to open recent photos from Android device in Snipping Tool

2023 Update (23H2) Launch

Build 22631Oct 31 2023
  • NEW
    AI:Copilot in Windows enabled by default
  • NEW
    File Explorer:New File Explorer with modernized UI from Moment 4 enabled by default
  • NEW
    Backup:Windows Backup app available by default
  • NEW
    Display:Dynamic Lighting support for RGB accessories

Windows 11 22H2

Moment 4

Build 22621.2361Sep 26 2023
  • NEW
    AI:Copilot in Windows (preview) introduced
  • NEW
    Start Menu:File preview flyout when hovering over Recommended section in Start
  • NEW
    Quick Settings:New volume mixer experience in Quick Settings
  • NEW
    Taskbar:Re-introduced ability to never combine taskbar buttons
  • NEW
    Taskbar:Ability to hide time and date in the system tray
  • NEW
    File Explorer:Modernized Details pane; Home page; address bar; and search box in File Explorer
  • NEW
    File Explorer:New Gallery feature in File Explorer
  • NEW
    File Explorer:Native support for 7z, rar, and tar archive formats
  • NEW
    Backup:New Windows Backup app with OOBE restore screen
  • NEW
    Emoji:Added Unicode Emoji 15.0 support and COLRv1 color format
  • NEW
    Accessibility:New Narrator natural voices in 9 additional languages
  • NEW
    Settings:New Home page in the Settings app
  • NEW
    Security:Redesigned Windows Security notification dialogs

Moment 3

Build 22621.1778May 24 2023
  • NEW
    Privacy:New presence sensor privacy settings in Settings app
  • NEW
    Taskbar:New VPN status icon on the taskbar
  • NEW
    Start Menu:Ability to show notification badge on Start menu user profile icon
  • NEW
    Accessibility:Live captions available in more languages
  • NEW
    Task Manager:Ability to create live kernel memory dumps in Task Manager
  • NEW
    Display:Introduced Content Adaptive Brightness Control (CABC) for desktops and battery devices
  • NEW
    Notifications:New copy button for two-factor authentication codes in notification toasts
  • NEW
    Settings:New USB4 hubs and devices page in Settings
  • NEW
    Kiosk:New multi-app kiosk mode
  • NEW
    Taskbar:Re-introduced ability to display seconds in the system clock on taskbar
  • NEW
    Audio:Bluetooth LE Audio and LC3 codec support

Moment 2

Build 22621.1344Feb 28 2023
  • NEW
    Phone Link:Added iOS support in the Phone Link app
  • NEW
    AI/Camera:New Studio Effects section in Quick Settings for NPU-compatible devices
  • NEW
    Accessibility:Redesigned Quick Assist app
  • NEW
    Widgets:Added third-party apps support in the Widgets panel
  • NEW
    Taskbar:Re-introduced tablet-optimized taskbar
  • NEW
    Notepad:Added support for tabs in the Notepad app
  • NEW
    Accessibility:New Braille display support and input/output languages in Narrator
  • NEW
    Settings:New Energy Recommendations page in Settings app
  • NEW
    Taskbar:Re-introduced the search box on the taskbar
  • NEW
    Input:New Tamil Anjal keyboard layout

Moment 1

Build 22621.675Oct 18 2022
  • NEW
    File Explorer:Tabbed browsing in File Explorer and refreshed left navigation pane
  • NEW
    Taskbar:Re-introduced taskbar overflow feature
  • NEW
    Share Window:Improvements to the built-in Windows share window
  • NEW
    Display:Added Auto Color Management (ACM) support optimized for OLED monitors
  • NEW
    Display:Added Variable Refresh Rate (VRR) support via DisplayID data
  • NEW
    Productivity:New inline suggested actions feature

22H2 Launch

Build 22621Sep 20 2022
  • NEW
    Task Manager:Redesigned Efficiency mode in Task Manager
  • NEW
    Taskbar:Re-added drag and drop feature on the taskbar
  • NEW
    Snap Layouts:Improved snap layout experience
  • NEW
    Accessibility:New live captions feature for real-time transcription
  • SECURITY
    App Control:New Smart App Control (SAC) for blocking untrusted applications
  • NEW
    Focus:Split Focus Assist into Do Not Disturb and Focus modes
  • NEW
    Inbox Apps:Included Clipchamp as inbox app
Official Microsoft Documentation: Windows 11 Release Notes

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