Microsoft、Windows 10 Insider Preview Build 14915をリリース - 配信システムの改良が進む

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Microsoftは本日、Windows 10の最新プレビュービルド「Windows 10 Insider Preview Build 14915」のPC版およびモバイル版を同時にリリースしました(Windows Experience BlogNeowin)。

Windows Insider Programに参加し、更新設定を”Fast”に設定しているユーザーは、既存のWindows 10環境からWindows Updateを利用して最新ビルドに更新することができます(PC版の場合「設定 > 更新とセキュリティ > Windows Update」より)。

build 14915は来年正式版が公開される予定のWindows 10の次期大型アップデート「Redstone 2」に向けたビルドで、Microsoftは初期段階では新機能の追加よりもWindowsのコア部分であるOneCoreを含む構造的な改良を行う計画を示しています。

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配信最適化の設定は、設定 > 更新とセキュリティ > Windows Update > 詳細オプションから設定可能で、配信の最適化が有効の場合、Insider Previewビルドや、OSの更新、アプリのアップデート等をローカルネットワークまたはインターネット上に存在する他のPCからダウンロードすることが可能となります。


  • We fixed the issue with being unable to use the power button on the Start menu.
  • We fixed the issue causing Cortana’s text to speech capabilities to not work. Cortana should be able to read text messages out loud for you, tell jokes, sing, or give verbal prompts as expected.
  • We fixed the issue causing the Settings app to crash on certain editions of Windows 10 when navigating to different settings pages due to a missing .dll file.
  • We made a number of improvements to translations, including fixing an issue in Windows Update where it would say “your phone is up to date” in French when confirming that your PC was up to date.
  • Changing functionality via Settings > Update & security > Windows Insider Program such as your ring settings should now work again on this build. For more information – see this forum post.
  • We fixed a compatibility issue from a recent platform change that causes apps such as Yahoo Mail, Trivia Crack, Google and the Skype Translator Preview app to crash.
  • We fixed an issue resulting in some Insiders experiencing a delay in Mail notification toasts appearing.
  • We fixed an issue where the “Open with” dialog’s “Look for another app on this PC” link wasn’t working if the dialog appeared after using the “Run” dialog to open a file with an unassociated file type.
  • We have updated the Connect flyout so that the clickable area for each device listed now spans across the full width of the flyout.
  • We fixed an issue where if a Chinese Input Method Editor is active it could result in logging in to not succeed after device goes into and is woken up from Connected Standby.
  • We fixed an issue where for certain websites in Microsoft Edge, using CTRL + A to select all text and then copying it and trying to paste it into Notepad wouldn’t paste anything.
  • We fixed an issue where importing favorites into Microsoft Edge from Internet Explorer would fail if the Favorites folder had been redirected to another folder, for example “C:\Users\<user>\Documents\Favorites”.

その他Known issues(既知の問題)もいくつかリストアップされていますので、インストール前に確認しておくことをおすすめします。