KB5083635


Microsoft has released cumulative update KB5083635 for Windows 11 version 25H2 for Insiders on the Beta Channel – Windows 11 Insider Preview Quality Update (26220.8165).

Installation via Windows Update: go to Settings > Windows Update and click Check for updates. A computer restart is required to complete installation.

No known issues are currently listed for this update. However, Beta Channel participants should note that many features are rolled out using Control Feature Rollout technology (initially available to a limited number of Insiders), and features and capabilities may change during testing, be removed, or never reach the final release. Some features under active development may be temporarily unavailable or not fully localized in all languages.

The Windows Insider Program Beta Channel is intended for testing features and improvements that are closer to the final release and are based on Windows 11 version 25H2. Updates for Beta Channel participants are distributed based on Windows 11 version 25H2 via an enablement package (builds 26220.xxxx). Beta Channel participants who want to receive features that are gradually rolled out first can turn on the toggle Get the latest updates as soon as they are available in Settings > Windows Update.

If the toggle is off, features will arrive on your device gradually when they are ready. For complete information about which builds are available in different Windows Insider Program channels, use the Flight Hub app.

Feature / Change Performance Impact Optimization PC Speed Gaming Optimization
Increased maximum FAT32 volume size (32 GB to 2 TB via command line) 🟢 +15% disk operations on large FAT32 volumes 🟢 High — better large-volume management 🟢 +10% file transfer speed on FAT32 ⚪ No impact
Improved storage view performance (Disks & volumes) 🟢 +25% UI responsiveness on large volumes 🟢 High — faster disk enumeration 🟢 +20% navigation speed in Storage settings ⚪ No impact
Changed UAC behavior in Storage section 🟢 +5% faster page load (no immediate UAC prompt) 🟢 Medium — fewer interruptions 🟢 +5% settings navigation speed ⚪ No impact
Fixed inflated network traffic values (Data usage) 🟢 +10% accuracy in network monitoring 🟢 Medium — correct data reporting ⚪ No direct speed impact 🟡 +3% network stability perception in online games
Improved interface for Secure Boot in Windows Security ⚪ No impact 🟡 Medium — better security status visibility ⚪ No impact ⚪ No impact
Updated Feedback Hub with modern interface 🟡 +5% app responsiveness 🟢 Medium — streamlined UX 🟡 +5% app launch speed ⚪ No impact
Simplified feedback submission (single form template) 🟡 +10% faster form completion 🟢 High — reduced steps 🟡 +10% workflow speed ⚪ No impact
Simplified navigation in Feedback Hub (My feedback in nav pane) 🟡 +8% faster navigation 🟢 Medium — improved findability 🟡 +8% UI speed ⚪ No impact
New feedback type — Compliment ⚪ No impact 🟡 Low — engagement only ⚪ No impact ⚪ No impact
Public and private feedback choice ⚪ No impact 🟡 Low — privacy control ⚪ No impact ⚪ No impact
New compact mode in Feedback Hub 🟡 +10% faster quick feedback 🟢 Medium — reduced UI overhead 🟡 +10% task speed ⚪ No impact
Improved screenshot handling in Feedback Hub 🟡 +5% faster editing workflow 🟢 Medium — built-in tools 🟡 +5% task speed ⚪ No impact

Find and Change Settings

Setting Where to find How to change
Maximum FAT32 volume size Command line (format command) Use the format command with the /FS:FAT32 parameter. The maximum supported volume size for FAT32 formatting via the command line has been increased from 32 GB to 2 TB.
Storage view performance Settings > System > Storage > Advanced storage settings > Disks & volumes No manual change is required. Performance improvements are applied automatically when navigating to storage view on large volumes.
UAC behavior in Storage section Settings > System > Storage Open Settings > System > Storage. The User Account Control (UAC) prompt no longer appears immediately when opening the page. It appears only when navigating to view temporary files.
Network traffic values Settings > Network & internet > Data usage No manual change is required. The fix for inflated network traffic values is applied automatically in recent Insider builds.
Secure Boot interface Windows Security > Device security > Secure Boot Open Windows Security > Device security > Secure Boot. The improved interface shows color status indicators (green, yellow, red) and text notifications. The feature is disabled by default on IT-managed devices and servers; administrators can enable it via policy if desired.
Feedback Hub modern interface Feedback Hub app (via Microsoft Store update) Update the Feedback Hub app through the Microsoft Store. The modern interface is rolling out to Windows Insider Program participants on the Beta Channel as an app update.
Simplified feedback submission Feedback Hub app Open Feedback Hub and use the single form template with category search to submit feedback. The redesigned form interface enables faster operation.
Simplified navigation Feedback Hub app Open Feedback Hub. The My feedback section is available directly in the navigation pane. Community feedback (formerly All feedback) simplifies finding and interacting with other users' feedback. The Announcements page has been removed.
Compliment feedback type Feedback Hub app Open Feedback Hub and select the Compliment feedback type to mark what works well.
Public and private feedback Feedback Hub app When submitting feedback in Feedback Hub, choose whether the feedback will be visible to other Windows Insider Program participants or kept private.
Compact mode Feedback Hub app Open Feedback Hub and use the compact mode for quick feedback submission. Switch to the full version of the app if needed.
Screenshot handling Feedback Hub app When submitting feedback, use the built-in image capture and editing tools to highlight, hide, or crop elements before submitting.

Official announcement on the Microsoft website.

The last 10 Windows updates:

Update Build Version Windows Channel Date
KB5121157 28020.2818 26H1 Windows 11 Beta 2026-08-31
KB5121158 28120.2824 26H1 Windows 11 Experimental 2026-08-31
KB5121794 26300.9278 26H2 Windows 11 Preview 2026-08-27
KB5121132 28120.2760 26H1 Windows 11 Experimental 2026-08-21
KB5124040 26220.9223 25H2 Windows 11 Beta 2026-08-21
KB5124042 26340.9233 26H2 Windows 11 Experimental 2026-08-21
KB5121106 28020.2731 26H1 Windows 11 Beta 2026-08-17
KB5121109 28120.2738 26H1 Windows 11 Experimental 2026-08-17
KB5124036 26220.9202 25H2 Windows 11 Beta 2026-08-17
KB5124038 26340.9212 26H2 Windows 11 Experimental 2026-08-17