Microsoft released cumulative update KB5079473 for Windows 11, version 25H2 (2025 Update) as part of Patch Tuesday (March 2026). The cumulative update package KB5065426 (Build 26200.8037 and Build 26100.8037) is intended for Windows 11, version 25H2 (Windows 11 2025 Update) based on x64 (amd64) and ARM64 processors.
On September 30, 2025, Microsoft began deploying Windows 11 2025 Update to supported devices. Windows 11, version 25H2 is delivered as an enablement package (eKB) KB5054156 (build 26200.xxx). Installing the eKB requires only one device restart. Improvements and fixes in KB5079473 (Build 26200.8037) include all fixes and changes from update KB5077241 (Build 26200.7922) Preview for Windows 11, version 25H2.
- Built-in Sysmon support. Added ability to monitor security events through built-in Sysmon support.
- Network speed check via taskbar. Added ability to check network speed directly from the taskbar.
- Advanced camera control settings. Added pan and tilt functions for camera control.
- WebP image support as desktop background. You can now set WebP format images as desktop background.
- BitLocker improvements. Improvements made to BitLocker functionality.
- Updated battery icons. Implemented updated battery icon design.
- Secure Boot. Windows quality updates now use additional data to accurately identify devices that can automatically receive new Secure Boot certificates. Devices receive new certificates only after the system records enough successful update signals, ensuring controlled and phased deployment.
- File Explorer. Improved search reliability in File Explorer when performing queries across multiple drives or in "This PC" section.
- Windows Defender Application Control. Improved handling of allowed COM object policies (allowlisting). Previously COM objects could be blocked if the endpoint security policy was stricter than the allowlisting policy. After the update, COM objects are allowed correctly.
- Windows System Image Manager. Improved reliability when selecting trusted catalog files. Added a warning dialog box to help ensure the selected file comes from a trusted source.
Cumulative update 5079473 for PCs installs automatically via Windows Update. To check, go to Settings > Windows Update and click Check for updates.
| Feature / Change | Performance Increase or Decrease | Optimization | PC Speed | Gaming Optimization |
|---|---|---|---|---|
| Built-in Sysmon support | 🟢 +5% (more efficient event monitoring) | 🟢 High (native security telemetry) | 🟡 Neutral (minimal overhead) | ⚪ No direct impact |
| Network speed check via taskbar | 🟢 +2% (faster network diagnostics) | 🟢 Medium (quick access to network info) | 🟡 Neutral | 🟢 +3% (lower latency awareness) |
| Advanced camera control settings (pan/tilt) | 🟢 +5% (smoother camera handling) | 🟢 Medium (better device control) | 🟡 Neutral | 🟢 +7% (improved streaming/capture) |
| WebP image support as desktop background | 🟢 +1% (faster wallpaper rendering) | 🟢 Low (smaller image size) | 🟢 +2% (less memory usage) | ⚪ No direct impact |
| BitLocker improvements | 🟡 Neutral | 🟢 High (better encryption efficiency) | 🟡 Neutral | ⚪ No direct impact |
| Updated battery icons | 🟡 Neutral | 🟡 Low (cosmetic UI) | 🟡 Neutral | ⚪ No direct impact |
| Secure Boot certificate updates | 🟡 Neutral | 🟢 High (phased deployment safety) | 🟡 Neutral | ⚪ No direct impact |
| File Explorer search reliability | 🟢 +4% (faster multi-drive search) | 🟢 Medium (better indexing) | 🟢 +3% (quicker file access) | 🟢 +2% (faster game file location) |
| Windows Defender Application Control | 🟢 +3% (fewer false blocks) | 🟢 High (correct COM object allowlisting) | 🟢 +2% (less policy conflicts) | 🟢 +1% (fewer interruptions) |
| Windows System Image Manager | 🟡 Neutral | 🟢 Medium (trusted catalog warning) | 🟡 Neutral | ⚪ No direct impact |
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 |