Windows 11 Insider Preview Build 23555がリリース - Devチャンネル向け、Copilotやナレーターの不具合を修正

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Microsoftは9月28日(現地時間)、Windows 11のWindows Insider ProgramのDevチャンネル向けの最新ビルド「Windows 11 Insider Preview Build 23555」をリリースしました(Windows Blog)。


Windows Insider Programの更新オプションでDev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 23555の新機能

Build 23555には新機能は追加されていません。




  • Fixed an issue that was causing explorer.exe to crash when trying to open Copilot from the taskbar.


  • Fixed an issue that was preventing you from previewing Narrator natural voices in Settings.
  • Fixed an issue that prevented Narrator from reading the time stamp on Start’s recommended items correctly.

[Task Manager]

  • Fixed an issue which was causing a Task Manager crash when changing Always on Top mode.

NOTE: Some fixes noted here in Insider Preview builds from the Dev Channel may make their way into the servicing updates for the released version of Windows 11.

Known issues

[Start menu]

  • Some apps under All apps on the Start menu, such as PWA apps installed via Microsoft Edge, may incorrectly be labeled as a system component.

[Windows Copilot]

  • [NEW] The new Copilot icon is not shown currently in Dev Channel builds. It will be updated in an upcoming flight – stay tuned!
  • We heard feedback from Insiders in the Dev Channel that the Windows Copilot Preview is not available in some regions. We found an issue and plan to re-enable it for these Insiders with a fix in a future flight.
  • You can use Alt + Tab to switch out of Windows Copilot, but not back into it. Windows + C will move focus back to Windows Copilot
  • When first launching or after refreshing Copilot while using voice access you’ll need to use “Show grid” commands to click in the “Ask me anything” box for the first time.


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