--- title: "Announcing Windows 11 Insider Preview Build 26300.7939 (Dev Channel)" url: https://daily.dev/posts/announcing-windows-11-insider-preview-build-26300-7939-dev-channel--tpzh3zvba source_url: https://blogs.windows.com/windows-insider/2026/02/27/announcing-windows-11-insider-preview-build-26300-7939-dev-channel/ type: article source: "Windows Blogs" published: 2026-02-27T18:09:13.531Z updated: 2026-02-27T18:09:34.546Z tags: ["windows", "accessibility", "bluetooth"] reading_time: 5 upvotes: 0 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Announcing Windows 11 Insider Preview Build 26300.7939 (Dev Channel) **[Windows Blogs](https://daily.dev/sources/windows)** · 5 min read · 0 upvotes · 0 comments ## Summary Windows 11 Insider Preview Build 26300.7939 is now available in the Dev Channel. Key additions include enhanced security for batch file processing via a new LockBatchFilesInUse registry setting that prevents file modification during execution and reduces signature validation overhead. Shared audio (preview) gains per-listener volume sliders and a taskbar indicator, with new device support including Samsung Galaxy Buds 4, Sony WF-1000XM6, and Xbox Wireless Headset. Narrator gets a new status bar reading command, and there are reliability improvements for taskbar autohide animations, storage cleanup, and ADLaM keyboard input. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Announcing Windows 11 Insider Preview Build 26220.7934 \(Beta Channel\)](https://daily.dev/posts/announcing-windows-11-insider-preview-build-26220-7934-beta-channel--y9eczhhzp) · Windows Blogs · 0 upvotes · 0 comments - [Announcing Windows 11 Insider Preview Build 28020.1743 \(Canary Channel\)](https://daily.dev/posts/announcing-windows-11-insider-preview-build-28020-1743-canary-channel--kigz6spzv) · Windows Blogs · 0 upvotes · 0 comments - [Announcing Windows 11 Insider Preview Build 26300.7965 \(Dev Channel\)](https://daily.dev/posts/announcing-windows-11-insider-preview-build-26300-7965-dev-channel--dck4odwgm) · Windows Blogs · 0 upvotes · 0 comments - [Announcing Windows 11 Insider Preview Build 26300.8155 \(Dev Channel\)](https://daily.dev/posts/announcing-windows-11-insider-preview-build-26300-8155-dev-channel--rnbmheb7m) · Windows Blogs · 0 upvotes · 0 comments --- Tags: [#windows](https://daily.dev/tags/windows), [#accessibility](https://daily.dev/tags/accessibility), [#bluetooth](https://daily.dev/tags/bluetooth) [View this post on daily.dev](https://daily.dev/posts/announcing-windows-11-insider-preview-build-26300-7939-dev-channel--tpzh3zvba)