Microsoft releases cumulative update KB5125726 (Build 28120.2912) for Windows 11 version 26H1, intended for insiders on the Experimental channel. This update includes a small set of general improvements and fixes aimed at improving system stability. The changes are being rolled out to insiders gradually, so some users may not see them immediately.
- Input. Fixed an issue in recent builds where pinch-to-zoom on the touchpad stopped working in certain applications.
- Input. Fixed an issue in recent builds where the mouse cursor moved in the wrong direction for some insiders on monitors with portrait orientation.
Known issues: Microsoft is investigating reports that games with Easy Anti-Cheat (EAC) protection may fail to launch and display the error “The application was unable to start correctly (0xc000007b)”. A fix is promised in the next build.
Builds released to the Experimental channel (26H1) represent the latest platform changes at early stages of development and are not tied to any specific Windows release. Features and capabilities included in these builds may never ship in the final version, as Microsoft tries out different concepts and gathers feedback. Features may change, be removed, or be replaced, and some of them may never become available outside the Windows Insider Program. However, when these features are ready, they may appear in future Windows releases.
To install the update, go to Settings > Windows Update and click Check for updates. A restart of the computer is required to complete the installation.
| Feature / Change | Performance Increase/Decrease | Optimization | PC Speed | Gaming Optimization |
|---|---|---|---|---|
| Fixed an issue where pinch-to-zoom on the touchpad stopped working in certain applications | ⚪ No direct impact | 🟢 High (restores input reliability) | 🟡 Low (smoother navigation) | ⚪ No impact |
| Fixed an issue where the mouse cursor moved in the wrong direction on portrait-oriented monitors | ⚪ No direct impact | 🟢 High (input accuracy restored) | 🟡 Low (removes control lag/frustration) | 🟡 Low (better aim/control in portrait setups) |
Find and Change Settings
| Setting | Where to find | How to change |
|---|---|---|
| Touchpad Pinch-to-Zoom | Settings > Bluetooth & devices > Touchpad > Scroll & zoom | To adjust pinch-to-zoom behavior after the fix, open Settings > Bluetooth & devices > Touchpad > Scroll & zoom. Make sure the "Pinch to zoom" checkbox is enabled. If the issue persists in a specific application, check the app's own zoom settings or restart the application to apply the updated touchpad behavior. |
| Mouse Cursor Direction on Portrait Monitors | Settings > Bluetooth & devices > Mouse > Additional mouse settings | Open Settings > Bluetooth & devices > Mouse and select Additional mouse settings. In the Mouse Properties window, go to the Pointer Options tab and verify that Enhance pointer precision is set as desired. If the cursor still moves incorrectly on a portrait monitor, check the display orientation under Settings > System > Display > Display orientation and ensure it matches the physical monitor rotation. |
Official announcement on the Microsoft website.
The last 10 Windows updates:
| Update | Build | Version | Windows | Channel | Date |
|---|---|---|---|---|---|
| KB5124010 | 26300.9539 | 26H2 | Windows 11 | Preview | 2026-09-10 |
| KB5125726 | 28120.2912 | 26H1 | Windows 11 | Experimental | 2026-09-08 |
| KB5124058 | 26340.9354 | 26H2 | Windows 11 | Experimental | 2026-09-08 |
| KB5124061 | 26220.9343 | 25H2 | Windows 11 | Beta | 2026-09-08 |
| KB5124059 | 28020.2904 | 26H1 | Windows 11 | Beta | 2026-09-08 |
| KB5122880 | 22631.7582 | 23H2 | Windows 11 | Stable | 2026-09-08 |
| KB5122878 | 19045.7725 | 22H2 (ESU) | Windows 10 | Stable | 2026-09-08 |
| KB5124012 | 28000.2954 | 26H1 | Windows 11 | Stable | 2026-09-08 |
| KB5124008 | 26300.9445 | 26H2 | Windows 11 | Stable | 2026-09-08 |
| KB5121157 | 28020.2818 | 26H1 | Windows 11 | Beta | 2026-08-31 |