KB5101680

Microsoft has released cumulative update KB5101680 (Build 28120.2630) for Windows 11 version 26H1, intended for Insiders on the Experimental channel. The build contains a small set of general improvements and fixes that enhance the overall quality of the system, as well as several new features that are rolling out gradually.

• Unified update installation mechanism. Driver, .NET, and firmware updates now align with the monthly quality update. This reduces the number of reboots to one per month. It is also now possible to extend the pause of updates as many times as needed.
• Adaptive hibernation mode. The system now hibernates less frequently when the battery charge is above 80% and transitions to hibernation earlier when the charge is below 10%. Overall, the refined policy allows for more frequent instant wake from modern standby and conserves battery power more efficiently at low charge levels.
• New touchpad gestures. Settings for high-precision touchpads have been added to the Settings app: control over the basic scrolling and zooming speed, as well as accelerated scrolling, where repeating the gesture increases the speed for quickly navigating long documents. The features work in most applications; however, WinUI 3-based interfaces require new versions of WinAppSDK for full support — the necessary changes are being backported to versions 1.8 and 2.0. These capabilities previously appeared on the Beta channel in build 26220.8925.

The build includes important fixes. An issue with automatic File History backup to network folders over the SMB protocol has been resolved, which was failing due to an erroneous invalid credentials message during connection. In File Explorer, a bug was fixed where files on a mapped DFS drive could be incorrectly treated as originating from the internet if the device booted without a network and later connected to one — this caused a warning stating File that you are trying to view could harm your computer to appear in the preview pane and an unexpected Mark of the Web tag to be assigned to copied files. A problem with persistent mouse cursor flickering reported by some Insiders after recent builds has been resolved, and the preservation of voice input settings, including automatic punctuation and the launch panel, has been improved.

Known issues:

• Compatibility with PUBG: BATTLEGROUNDS. After installing this build, the game may fail to launch. This safeguard hold is in place to prevent system crashes while Microsoft works with the developer on a fix. Details and timelines will be announced later.

The build also contains an updated pre-release signing certificate. Such certificates are updated periodically to ensure that Insider devices remain on supported builds and continue to receive future Insider Preview updates. The current certificate expires on August 11, 2026 — it is necessary to update to this or a later build with the renewed certificate before that date.

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

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