KB5120996


Microsoft has released preliminary update KB5120996 (Build 28000.2796) for Windows 11 version 26H1. This package is intended for devices based on ARM64 architecture processors (Snapdragon). This cumulative update includes many improvements aimed at increasing stability, usability, and expanding system functionality. Many changes were previously presented to users of versions 24H2 and 25H2 as part of update KB5101684, but now they are becoming available for the 26H1 branch. Key innovations and fixes are listed below.

No known issues have been recorded in this update. To install update KB5120996, you need to go to the Settings menu, select Windows Update, and click the Check for updates button. The system will automatically detect the available package and offer to install it.

The update can also be downloaded manually from the links above. It is recommended to create a system restore point before installation so that changes can be rolled back in case of unforeseen situations. A computer restart will be required after the installation is complete.

If the update does not appear immediately, its deployment may be happening gradually, and it will become available for your device within a few days.

Feature / Change Performance Increase Performance Decrease Optimization PC Speed Gaming Optimization
File Explorer: file sizes now shown in KB, MB, GB, not just KB ⚪ No direct impact ⚪ No impact 🟢 High — faster visual parsing of large files 🟡 Low — quicker file size comprehension ⚪ No impact
File Explorer: middle-click opens folder in new tab ⚪ No impact ⚪ No impact 🟡 Medium — fewer steps for tab navigation 🟡 Low — faster workflow ⚪ No impact
File Explorer: fixed gray flash and unexpected scroll to top on Home 🟢 Medium — less UI stutter ⚪ Fixed regression 🟢 High — smoother navigation 🟡 Low — fewer interruptions ⚪ No impact
File Explorer: clearer thumbnails in Recommended section ⚪ No impact ⚪ No impact 🟡 Medium — better visual recognition ⚪ No impact ⚪ No impact
Windows Search: better handling of typos and partial app names 🟢 Medium — faster app launching ⚪ No impact 🟢 High — reduced search friction 🟡 Low — quicker access ⚪ No impact
Windows Search: more relevant settings shown higher 🟢 Low — fewer search refinements ⚪ No impact 🟡 Medium — improved result ranking 🟡 Low — faster settings access ⚪ No impact
Voice Access: Voice Isolation reduces background noise 🟢 Medium — more accurate voice commands ⚪ No impact 🟢 High — better input reliability 🟡 Low — less repeated commands 🟡 Low — possible hands-free control
Voice Access: three speech recognition modes 🟢 Low — user choice for noise filtering ⚪ No impact 🟡 Medium — adaptable to environment ⚪ No impact ⚪ No impact
Voice Access: Korean language support ⚪ No impact ⚪ No impact 🟡 Low — wider accessibility ⚪ No impact ⚪ No impact
Voice Access: improved launch reliability 🟢 Low — faster startup of feature ⚪ Fixed crash/stall 🟡 Medium — more consistent availability 🟡 Low — less waiting ⚪ No impact
Widgets: notification icons use Windows contrast color instead of red ⚪ No impact ⚪ No impact 🟡 Low — reduced visual distraction ⚪ No impact ⚪ No impact
Widgets: simplified lock screen — only Weather by default 🟢 Low — less background widget loading ⚪ No impact 🟡 Low — reduced clutter 🟡 Very low — slightly lighter lock screen ⚪ No impact
Touchpad: new gesture settings incl. scroll/zoom speed 🟢 Low — adjustable input responsiveness ⚪ No impact 🟡 Medium — user customization 🟡 Low — faster cursor/scroll control 🟡 Low — better precision for some games
Start menu: improved reliability of view settings saving ⚪ No impact ⚪ No impact 🟡 Medium — personalized layout sticks 🟡 Low — less reconfiguration ⚪ No impact
Start menu: improved keyboard navigation in app list 🟢 Low — faster keyboard-only use ⚪ No impact 🟡 Medium — better accessibility 🟡 Low — fewer input errors ⚪ No impact
Voice Typing: Fluid dictation disabled by default 🟡 Low — less background processing for new users ⚪ No impact 🟡 Low — opt-in feature reduces overhead 🟡 Low — slightly lighter input stack ⚪ No impact
Input: improved saving of mouse pointer size ⚪ No impact ⚪ No impact 🟡 Low — setting persistence ⚪ No impact ⚪ No impact
Windowing: system dialogs proper size on small tablets 🟢 Low — fewer resize operations ⚪ No impact 🟡 Medium — better window management 🟡 Low — less manual adjustment ⚪ No impact
Accessibility: Magnifier performance on touch improved, touch bars off by default 🟢 Medium — smoother magnification on touch ⚪ No impact 🟢 High — reduced UI overlap 🟡 Low — less accidental activation ⚪ No impact
Windows Hello: Enhanced Sign-in Security supports external fingerprint scanners ⚪ No impact ⚪ No impact 🟡 Medium — faster secure login on desktop 🟡 Low — quicker authentication ⚪ No impact
Fonts: restored Unicode variation sequences in Myanmar Text ⚪ No impact ⚪ No impact 🟡 Low — correct glyph rendering ⚪ No impact ⚪ No impact
Fonts: improved Mongolian Baiti rendering ⚪ No impact ⚪ No impact 🟡 Low — accurate text display ⚪ No impact ⚪ No impact
Account management: updated design with subscription status icon ⚪ No impact ⚪ No impact 🟡 Low — quicker status check ⚪ No impact ⚪ No impact
Taskbar: improved reliability of notification area on touch in tablet mode 🟢 Low — fewer reloads ⚪ Fixed crash/stutter 🟡 Medium — stable touch UI 🟡 Low — less waiting ⚪ No impact
AI component: Image Generation removable on Copilot+ PCs 🟢 Low — frees disk and memory if removed ⚪ No impact 🟡 Medium — user control over AI features 🟡 Low — less background load ⚪ No impact
Windows Setup: parental control notification added ⚪ No impact ⚪ No impact 🟡 Low — informed setup choice ⚪ No impact ⚪ No impact
Power & battery: settings applied to all power plans 🟢 Low — consistent power behavior ⚪ No impact 🟡 Medium — predictable sleep/display timing 🟡 Low — avoids conflicting plans 🟡 Very low — more stable performance profile
Power & battery: restored battery saver charge threshold setting 🟢 Low — better battery health management ⚪ No impact 🟡 Medium — user-defined saver trigger 🟡 Low — extends battery lifespan ⚪ No impact
Windows Update: improved calculation of update progress ⚪ No impact ⚪ No impact 🟡 Low — accurate progress display ⚪ No impact ⚪ No impact
Windows Update: changed post-update cleanup logic 🟢 Medium — immediate post-update performance gain ⚪ No impact 🟢 High — reduced stale file impact 🟡 Low — less temporary slowdown 🟡 Low — may reduce background stutter
Sounds: improved system sounds in dark mode ⚪ No impact ⚪ No impact 🟡 Very low — cosmetic polish ⚪ No impact ⚪ No impact
Date & time: improved time zone change notification conditions ⚪ No impact ⚪ No impact 🟡 Low — fewer unnecessary alerts ⚪ No impact ⚪ No impact
Date & time: improved DST data for Middle East, Morocco, Israel, Greenland ⚪ No impact ⚪ No impact 🟡 Low — correct time transitions ⚪ No impact ⚪ No impact
Network: improved DHCP lease renewal reliability 🟢 Medium — fewer network dropouts ⚪ Fixed connectivity loss 🟢 High — stable IP renewal 🟡 Low — less interruption 🟡 Low — fewer lag spikes from DHCP
Printing: improved IPPS printing speed (pages per minute) 🟢 Medium — faster print jobs ⚪ No impact 🟢 High — efficient secure printing 🟡 Low — quicker output ⚪ No impact
Clipboard: improved reliability in Remote Desktop and AVD 🟢 Low — fewer copy/paste failures ⚪ Fixed intermittent issues 🟡 Medium — dependable clipboard sync 🟡 Low — less repeated actions ⚪ No impact
General stability: explorer.exe reliability (jump lists, recent files, Task View) 🟢 Medium — fewer freezes/crashes ⚪ Fixed hangs 🟢 High — smoother file operations 🟡 Low — less waiting for UI ⚪ No impact
General stability: sign-in/lock screen reliability under low RAM, Start/taskbar at startup 🟢 High — faster login and boot responsiveness ⚪ Fixed crashes 🟢 High — better resource handling 🟡 Low — quicker to desktop 🟡 Low — more stable background during launch

Official announcement on the Microsoft website.

The last 10 Windows updates:

Update Build Version Windows Channel Date
KB5127757 28120.3181 26H1 Windows 11 Experimental 2026-10-07
KB5127758 26220.9606 25H2 Windows 11 Beta 2026-10-07
KB5127754 28020.3172 26H1 Windows 11 Beta 2026-10-07
KB5127753 26340.9616 26H2 Windows 11 Experimental 2026-10-07
KB5124192 28120.3151 26H1 Windows 11 Experimental 2026-10-02
KB5124196 28020.3142 26H1 Windows 11 Beta 2026-10-02
KB5124197 26220.9587 25H2 Windows 11 Beta 2026-10-02
KB5124193 26340.9596 26H2 Windows 11 Experimental 2026-10-02
KB5124166 26220.9568 25H2 Windows 11 Beta 2026-09-25
KB5124163 28020.3112 26H1 Windows 11 Beta 2026-09-25