September cumulative updates for Windows 11 and Windows 10 released. Such updates primarily focus on fixing discovered bugs and vulnerabilities, but may also include new features. Here are the details.
Microsoft to Discontinue Outlook Lite Mobile Application
Microsoft will soon cease support for Outlook Lite, its lightweight mobile email application. The process will start on October 6, 2025. From that date, the company will block all new installations of the app. Current users may retain access temporarily, though Microsoft has not specified an end date for full discontinuation.
Windows 11 Build 27938 (Canary) adds AI Actions to File Explorer
Microsoft has released a new preview build of Windows 11, number 27938, to Windows Insiders using the Canary channel. Recently, the branch name from which builds are released has changed to BR_RELEASE. This is due to internal development cycles of the operating system. The Windows Insider team treats these builds the same as builds from the RS_PRERELEASE branch. However, due to the branch change, some features have been temporarily removed from Windows 11 Insider builds. Microsoft plans to bring them back in the future. BR_RELEASE builds do not refer to any feature update for Windows 11.
Microsoft Edge 140 Released with Scareware Blocker and HTTPS-first
Microsoft is releasing the stable version of Microsoft Edge 140 ( full version tag is 140.0.3485.54), which comes with several new features, improvements, and bug fixes. Here are the details.
Windows 11 Build 26120.5790 (Beta) Adds Even More AI Features
Microsoft a preview release of Windows 11, Build 26120.5790 (KB5065779), to Windows Insiders in the Beta channel. It adds several new features on Copilot+ PCs, similarly to its Dev channel counterpart.
Windows 11 Build 26220.5790 (Dev) Adds Even More AI Features
Microsoft a preview release of Windows 11, Build 26220.5790 (KB5065779), to Windows Insiders in the Dev channel. It adds several new features on Copilot+ PCs. Please note that the major build number for the Dev channel has changed to 26220. Windows 11 version 25H2 will have a major build number of 26200, and it is already available in the Release Preview ring.
Mozilla Extends Firefox 115 ESR Support on Windows 7/8 to March 2026
Mozilla has announced an extension of support for Firefox 115 ESR (Extended Support Release), now maintaining the branch until March 2026. This update adjusts the previous timeline, which had initially scheduled end-of-life for March 2025 and was later revised to September 2025.
Chrome 140 Released with IP Hiding and Script Blocking
Google has released Chrome 140 in the stable channel. Users requiring longer support intervals can use the Extended Stable version, which receives updates every eight weeks. The next major release, Chrome 141, is scheduled for September 30. Chrome 140 comes with enhanced privacy and new features detailed below.
Microsoft Releases Original 6502 BASIC Source Code
Microsoft has officially released the source code for its 6502 BASIC interpreter under an open-source license. This continues the recently started trend of open-sourcing the historically significant software made by the company decades ago.
OEM Requirements for Functional USB Type-C Notifications in Windows 11
Windows 11 includes a built-in notification system to support full USB Type-C functionality. This feature delivers alerts related to connection issues, suboptimal charging performance, and incompatible accessories. These notifications depend on precise hardware configuration at the firmware level.
