Microsoft has released cumulative update KB5124114 (Build 26340.9482) for Windows 11, version 26H2 for Insiders in the Experimental channel. Update KB5124114 includes Memory Integrity on compatible computers, speeds up search in File Explorer, changes the frame color during screen capture, and fixes crashes with the mouse cursor, wallpaper, and brightness that appeared in recent builds. The changes are being rolled out to Insiders gradually, so they will not appear for everyone at the same time.
- Security. Memory Integrity protection (HVCI) is automatically rolling out to more compatible devices: Windows can enable it when installing updates on supported computers to improve protection and prepare the system for other security mechanisms. The choice made by the user or administrator is preserved.
- Context menu. When opening the menu for the first time, a tip may appear explaining that its composition can be customized. The context menu customization item itself can now be disabled in its new settings. Several minor issues in the Send to item have been fixed.
- File Explorer search. Search from the This PC section has been switched to the indexing service: it has become noticeably faster and works the same way as search on the File Explorer Home page.
- Taskbar. Fixed scaling of the Input Method Editor (IME) icon when small taskbar icons are enabled.
- Screen capture. The frame outlining the recorded area has become red instead of yellow, making active screen capture more noticeable.
- Settings. The design of the Settings > System > Storage > Temporary files page has been slightly reworked. Fixed a bug in recent builds that caused custom mouse cursor appearance settings not to apply. Fixed a bug in recent builds that caused the selected desktop wallpaper to reset after a reboot.
- Brightness. Fixed the cause of screen brightness issues in recent builds, including the case where its settings became inactive.
Installation via Windows Update: go to Settings > Windows Update and click Check for updates. A computer restart will be required to complete the installation.
| Feature / Change | Performance increase or decrease | Optimization | PC speed | Gaming optimization |
|---|---|---|---|---|
| Memory Integrity protection (HVCI) automatically rolling out to more compatible devices | 🔴 High decrease (HVCI can reduce performance by 5–30% depending on CPU and workload) | 🟡 Medium (improves system security readiness but may require driver compatibility checks) | 🔴 Medium decrease (virtualization-based security adds overhead to memory operations) | 🔴 High decrease (anti-cheat and games sensitive to VBS can lose 10–30% FPS) |
| Context menu first-open tip and new setting to disable customization item | ⚪ No impact | 🟢 Low improvement (minor UI cleanup, fewer confusing options) | ⚪ No impact | ⚪ No impact |
| File Explorer search from This PC switched to indexing service | 🟢 High increase (noticeably faster search results) | 🟢 High improvement (search now consistent with Home page search) | 🟢 Medium increase (faster file discovery, less waiting) | ⚪ No impact |
| Taskbar IME icon scaling fixed when small taskbar icons are enabled | ⚪ No impact | 🟢 Low improvement (correct UI rendering) | ⚪ No impact | ⚪ No impact |
| Screen capture recording frame changed from yellow to red | ⚪ No impact | 🟡 Low improvement (better visibility of active capture) | ⚪ No impact | 🟡 Low improvement (easier to see capture state while gaming) |
| Settings > System > Storage > Temporary files page redesign | ⚪ No impact | 🟢 Low improvement (cleaner layout, easier cleanup) | ⚪ No impact | ⚪ No impact |
| Fixed custom mouse cursor settings not applying | ⚪ No impact | 🟢 Medium improvement (settings now work as expected) | ⚪ No impact | 🟡 Low improvement (cursor personalization works in games and desktop) |
| Fixed desktop wallpaper resetting after reboot | ⚪ No impact | 🟢 Medium improvement (user preferences persist) | ⚪ No impact | ⚪ No impact |
| Fixed screen brightness issues, including inactive brightness settings | 🟢 Medium increase (brightness controls work reliably again) | 🟢 High improvement (resolves display-related bugs from recent builds) | 🟡 Low increase (no more manual workarounds) | 🟡 Low improvement (stable brightness during gaming and media) |
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 |