Microsoftは本日、Windows 10の最新プレビュービルド「Windows 10 Insider Preview build 17623」をリリースしました(Windows Blog、Neowin)。
公開されたプレビュー版は、今年の春にリリースが予定されている「Redstone 4」の次の大型アップデート「Redstone 5」の開発版ビルドです。Windows Insiders Programのオプションで、"Skip Ahead"を選択しているFastリングユーザーは、Windows Updateを利用して最新版に更新することができます。
Build 17623の新機能は以下の通り:
High Efficiency Image File Format (HEIF)の導入: 高品質の画像フォーマットHEIFのサポートが追加された。現在表示のみのサポートで、Windows App Preview Programで提供されている3月リリースの最新のフォトアプリ(Version 2018.18022.13740.0)で試すことができる。
安全な外部GPUの取り外し機能: RS5では外部GPUの安全な取り外し機能が導入される。取り外しアイコンをクリックすると、外部GPUを使用しているアプリケーションが一覧表示され、そのアプリケーションを終了するとデバイスを安全に取り外すことができる。
新しい設定画面のレイアウト: RS4 Build 17115で導入された新しプライバシー設定の導入。
Windows Defender Application Guard (WDAG)の改良: WDAGのパフォーマンスの改良や、ホストへのファイルのダウンロード機能の追加など。
その他以下のような内容が変更・修正されています。
- For Windows Insiders in the Skip Ahead ring, we will begin testing a change where links clicked on within the Windows Mail app will open in Microsoft Edge, which provides the best, most secure and consistent experience on Windows 10 and across your devices. With built-in features for reading, note-taking, Cortana integration, and easy access to services such as SharePoint and OneDrive, Microsoft Edge enables you to be more productive, organized and creative without sacrificing your battery life or security. As always, we look forward to feedback from our WIP community.
- We fixed an issue where the Microsoft Store may be completely broken or disappeared altogether after upgrading to this build.
- We fixed two issues impacting the usability of Windows Mixed Reality on the previous build (Windows Mixed Reality running at a very low frame rate (8-10fps), and a potential crash at startup that could cause Windows Mixed Reality to not work).
- We fixed an issue resulting in not being able to interact with title bars using touch when Sets was enabled.
- We fixed an issue resulting in the touch keyboard crashing when focus was moved to certain password fields.
- We’ve improved the performance of Bluetooth mice when the system is under load.
- We fixed an issue from recent flights causing precision touchpads to periodically need a few tries to be able to move the mouse.
- We fixed an issue resulting in the Amharic keyboard not working in Win32 apps.
- We fixed an issue where EFI and Recovery partitions were unexpectedly listed in Defragment and Optimize Drives.
- We fixed an issue optimizing drives in Defragment and Optimize Drives didn’t work in the last few flights.
- We fixed an issue resulting in a permanently black window if you dragged a tab out of a Microsoft Edge window, pulled it up to the top edge of the screen, and moved it back down and released it.
- We’ve updated the Cortana section in Settings to now be called “Cortana & Search”.
- We fixed an issue where you couldn’t use touch to interact with the Timeline scrollbar.
- We fixed an issue where a failed app update could result in that app becoming unpinned from the taskbar.
- We fixed an issue where if focus was set inside Action Center pressing Esc wouldn’t close the Action Center window.
- We fixed an issue that could result in ShellExperienceHost periodically waking the device from hibernate if active live tiles were pinned to Start.
公式ブログには、修正の詳細な内容のほか、既知の不具合もリストアップされています。インストールする前に確認しておくことをおすすめします。