Microsoftは4月17日(現地時間)、Windows 11のWindows Insider ProgramのCanaryチャンネル向けの最新ビルド「Windows 11 Insider Preview Build 29570.1000」をリリースしました(Windows Blog)。Canaryチャンネルで公開されるビルドは、将来の機能アップデートで追加される可能性のある、さまざまな新機能が先行して実装されています。プレビューチャンネルの中で最も不安定な可能性があり、提供されるドキュメントも限定的なものとなっています(例えば既知の不具合は掲載されないなど)。Windows Insider Programの更新オプションでCanaryチャンネルを選択し、Windows 11のプレビュー版を使用しているユーザーは、Windows Updateを利用して最新版に更新することができます。Build 29570.1000の新機能Build 29570.1000では、Windows 11 PC(デスクトップ/ノート/タブレット)でXboxモードが利用可能になりました。企業環境向けにプリインストールアプリの削除機能が強化されたほか、コンテキストメニューが改善され、.exe / .bat / .cmd を右クリックした際の「開く」アイコンが、既定アプリのアイコンと一致するように変更されています。リリースノートは以下のとおりです。What’s new in Canary Build 29570.1000Changes and Improvements gradually being rolled out with toggle on*This update includes platform changes in moving to a new active development build.[Gaming]Xbox mode is now available on Windows 11 PCs, including laptops, desktops, and tablets. Inspired by the Xbox console experience, Xbox mode offers a streamlined, full‑screen interface that puts your games front and center while minimizing background distractions. Xbox mode is designed for those moments when you want to lean back, pick up a controller, and focus on the game. Enter Xbox mode from the Xbox app, Game Bar settings, or by pressing Win + F11. For more information, see Full screen experience expands to more Windows 11 PC form factors.Feedback: Share your thoughts in Feedback Hub (WIN + F) under Gaming and Xbox > Xbox Mode.[Policy-Based Removal of Preinstalled Microsoft Apps]This update adds support for a dynamic app removal list to the “Remove Default Microsoft Store packages” policy for Windows Enterprise and Education. Administrators can remove additional MSIX/APPX-packaged apps by specifying their app package family names using Group Policy. The dynamic list is not currently available in Intune Settings Catalog. Validation must be performed using Group Policy or custom OMA-URI. For more information, see Policy-based in-box app removal.Feedback: Share your thoughts in Feedback Hub (WIN + F) under Developer Platform > App Deployment.[Context Menu]When right clicking on a .exe, .bat, or .cmd file, the context menu’s “Open” verb will now match the icon associated with the file’s default app.Feedback: Share your thoughts in Feedback Hub (WIN + F) under File Folders and Online Storage > File Explorer.[Touchpad] We’re adding a new setting in Settings > Bluetooth & Devices > Touchpad so you can choose how large the right-click zone size is (this is the portion in the bottom-right of your touchpad where pressing a single finger will result in a right-click), between default, small, medium, and large. Note – this setting only appears for touchpads that have a pressable surface for this. Some manufacturers may provide customization for this in their own apps – if you’ve customized your setting using an app like this, a “Custom” entry will be added to the dropdown, which preserves that value.Feedback: Share your thoughts in Feedback Hub (WIN + F) under Input and Language > Touchpad.[Lock screen] More widget options and support for lock screen widget personalization (previously referred to as “Weather and more”) are rolling out. After initial launch with Windows Insiders in the European Economic Area (EEA), these updates are expanding to all regions. You can add, remove, and rearrange lock screen widgets such as Weather, Watchlist, Sports, Traffic, and more. Any widget that supports the small sizing option can be added. To customize your lock screen widgets, go to Settings > Personalization > Lock screen.FEEDBACK: Please file feedback in Feedback Hub (WIN + F) under Desktop Environment > Lock screen.[Input]Pen settings: we have made refinements to the Pen settings page including small changes to the options for the pen tail button. A new option, “Same as Copilot key”, enables the pen tail button to launch the same app as the Copilot key.Feedback: Share your thoughts in Feedback Hub (WIN + F) under Devices and Drivers > Bluetooth – Keyboards, Mice, and Pens.公式ブログには細かな変更内容がリストアップされていますので、インストールする前に確認することをおすすめします。