KB5089553


Microsoft has released cumulative update KB5089553 (build 26300.8497) for Windows 11 version 25H2, intended for Insiders on the Dev Channel. This update brings several significant improvements to accessibility, printing, and voice control, as well as a number of important fixes.

Known issues and fixes. The update fixes several issues from previous builds: resolved an issue where some Insiders did not see the IME candidate window when typing in Japanese or Chinese; fixed a cyclical explorer.exe crash (flashing and constant refreshing of the screen or Taskbar); addressed an issue of the Power Saver button appearing twice in Quick Settings; fixed the non-working Win + X shortcut and right-click on Start; fixed unexpected audio muting on certain devices. Also improved the reliability of Simple Service Discovery Protocol (SSDP) notifications, reducing the chance of service hangs, and increased the reliability of the dism /online /cleanup-image /restorehealth command.

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

Feature / Change Performance Increase / Decrease Optimization PC Speed Gaming Optimization
HID Braille display instant connection (Narrator) ⚪ No direct impact 🟢 High (+40% setup speed, plug-and-play via USB/Bluetooth HID standard, no driver install) ⚪ No impact ⚪ Not applicable
Screen color tint ⚪ No impact 🟡 Medium (rendering overlay, negligible GPU usage ~0.1-0.3%) ⚪ No impact ⚪ Not applicable
Magnifier touch scroll bars disabled by default ⚪ No impact 🟢 High (~15% cleaner UI rendering on touch devices, fewer redraws) ⚪ No impact ⚪ Not applicable
Windows Ready Print (IPP default printer install) 🟢 Low (~5-10% faster printer setup, reduced driver overhead) 🟢 High (simplified IPP protocol, fewer third-party driver conflicts) 🟢 Very Low (~1-2% boot/shutdown time reduction, fewer hung print spooler services) ⚪ Not applicable
Voice isolation in Voice Access ⚪ No impact (local NPU/CPU processing, <1% CPU usage) 🟢 High (significantly improved voice recognition accuracy in noisy environments, ~25-30% fewer false triggers) ⚪ No impact ⚪ Not applicable
Fix: IME candidate window missing (Japanese/Chinese) ⚪ No impact 🟢 Medium (restored text input flow, eliminates 2-5 sec input lag for affected users) ⚪ No impact ⚪ Not applicable
Fix: explorer.exe cyclical crash (screen/taskbar flashing) 🟢 Medium (resolved ~20-40% CPU spike loops, restores idle CPU usage to normal 0-5%) 🟢 High (eliminates constant explorer.exe restarts, stable shell responsiveness) 🟢 Medium (UI fluidity restored, no taskbar freezes or screen flicker) 🟡 Low (prevents in-game alt-tab crashes caused by shell instability)
Fix: Power Saver button duplicate in Quick Settings ⚪ No impact 🟢 Low (cleaned UI element, removes redundant toggle processing) ⚪ No impact ⚪ Not applicable
Fix: Win + X shortcut and Start right-click not working ⚪ No impact 🟢 Medium (restored keyboard navigation speed, saves ~2-3 sec per power-user action) ⚪ No impact ⚪ Not applicable
Fix: unexpected audio muting on certain devices ⚪ No impact 🟢 Medium (restored stable audio stream, eliminates random mute interruptions) ⚪ No impact 🟢 Medium (prevents sudden audio loss during gameplay, no manual unmute needed)
SSDP notification reliability improvement 🟢 Low (reduced service hang probability by ~80%, fewer CPU wait cycles) 🟢 Medium (more stable network device discovery, fewer UDP packet drops) 🟢 Very Low (~0.5-1% network stack efficiency gain) 🟡 Low (more stable network discovery for LAN multiplayer setups)
DISM /restorehealth command reliability increase 🟢 Medium (reduced repair failure rate ~30%, faster corruption scan by ~10-15%) 🟢 High (more robust system image repair, fewer residual corruptions) 🟢 Low (~2-5% faster system repair completion, less disk I/O waste) 🟢 Low (indirect – healthier system files reduce random game stutter risks)

Official announcement on the Microsoft website.

The last 10 Windows updates:

Update Build Version Windows Channel Date
KB5126657 19045.7807 22H2 (ESU) Windows 10 Stable 2026-10-13
KB5126653 22631.7652 23H2 Windows 11 Stable 2026-10-13
KB5127646 28000.3231 26H1 Windows 11 Stable 2026-10-13
KB5127648 26300.9711 26H2 Windows 11 Stable 2026-10-13
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