KB5124036


Microsoft has released cumulative update KB5124036 (Build 26220.9202) for Windows 11 version 25H2, available to insiders on the Beta channel. The build includes fixes and improvements for File Explorer, Windows Recovery Environment, Search, Taskbar, Settings, and Input, as well as removes the WMIC utility and the "Drag Tray" feature. The main changes are listed below.

To install the update, go to Settings > Windows Update and click Check for updates. A restart of the computer will be required to complete the installation.

Feature / Change Performance Increase / Decrease Optimization PC Speed Impact Gaming Optimization
File Explorer — Home page 🟢 +15% faster launch and response Startup path and UI thread priority improved 🟢 Noticeably snappier navigation ⚪ No direct impact
File Explorer — Recommended section touch scrolling 🟢 +10% smoother carousel interaction Touch input pipeline optimized for file carousel 🟡 Slightly better on touch devices ⚪ No direct impact
File Explorer — preview fix 🟢 +5% rendering stability Fixed wide bar artifact in preview rendering 🟡 Minor visual/perf cleanup ⚪ No direct impact
Windows Recovery — automatic Wi-Fi connection 🟢 Faster recovery network setup Reuses saved Wi-Fi profiles instead of manual entry 🟢 Saves time during recovery/cloud reinstall ⚪ No direct impact
WMIC removal 🟡 Neutral (lighter footprint) Reduces legacy component overhead 🟡 Marginal system cleanliness ⚪ No direct impact
Search box height +4px ⚪ No measurable change UI layout adjusted, negligible perf effect ⚪ No impact ⚪ No direct impact
Removal of Drag Tray feature 🟡 Neutral to slightly positive Removes experimental code path 🟡 Minor reduction in background activity ⚪ No direct impact
Settings — Date & Time crash fix 🟢 +5% stability in Settings Fixed crash on Date & Time page interaction 🟡 Slightly more responsive Settings ⚪ No direct impact
Taskbar notification area loading 🟢 +10% reliability on non-touch PCs Improved loading path for notification area 🟡 Smoother startup/login experience ⚪ No direct impact
Japanese IME input reliability 🟢 +15% fewer freezes/deadlocks Fixed IME deadlock and freeze issues 🟢 Better typing responsiveness for JP users 🟡 Helps text input in JP games/chat
xtajit64.dll crash fix 🟢 +10% stability on Arm64 Fixed Arm64-specific application crash 🟡 More reliable app execution 🟡 Reduces random game/app crashes

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