Microsoftは7月22日(現地時間)、Windows 11 Version 24H2用のプレビューアップデートKB5062660を公開しました。オプション扱いの更新プログラム(プレビュー版)で、多数の不具合が修正されているほか、さまざまな新機能が追加されています。Windows Updateの「更新プログラムのチェック」を利用するか、Microsoft Update Catalogからファイルをダウンロードすることで、手動でインストールすることができます。July 22, 2025—KB5062660 (OS Build 26100.4770) PreviewWindows 11 Version 24H2用の更新プログラムKB5062660では、RecallやClick to DoなどAI関連の機能が強化さ、設定画面でもAIエージェントが利用可能となっています(Copilot+ PC限定)。その他、Quick machine recoveryの導入や、スタートメニュー、スナップ機能、検索の改善、ファイルエクスプローラーの不具合の修正も行われています。リリースノートは以下の通りです。ハイライトGradual rolloutA gradual rollout distributes a release update over a period of time, rather than all at once. This means that users receive the updates at different times, and it might not be immediately available to all users.[Recall] New! Recall is now available in the European Economic Area (EEA). For more info, see Retrace your steps with Recall. In the EEA, Recall supports exporting snapshots to share with trusted third-party apps and websites. When saving snapshots is turned on for the first time, a unique Recall export code appears. This code is required to decrypt exported snapshots and is shown only once during initial setup. Microsoft doesn’t store or recover this code. To export, go to Settings > Privacy & Security > Recall & Snapshots > Advanced Settings and authenticate with Windows Hello. Choose to export past snapshots (from the last 7 days, 30 days, or all) or start a continuous export. Third-party apps can access exported snapshots only when both the export code and folder path are provided. If you lose or compromise the export code, reset Recall to generate a new one. New! For all Recall users worldwide, you can now reset Recall and delete all its data. Go to Settings > Privacy & Security > Recall & Snapshots to find a new advanced settings page. There, you’ll see a reset button that deletes all your snapshots and restores Recall to its default settings.[Click to Do] New! 1Practice in Reading Coach is a new Click to Do text action that helps you improve reading fluency and pronunciation. Select text on your screen, choose Practice in Reading Coach, and read the text aloud. Reading Coach gives you feedback and shows where to improve. To use this feature, install the free Microsoft Reading Coach app from the Microsoft Store. New! 1Read with Immersive Reader is a new text action in Click to Do that displays text in a focused, distraction-free environment. It helps improve reading and writing for all skill levels and abilities. You can adjust text size, spacing, font, and background theme, have text read aloud, break words into syllables, and highlight parts of speech. The picture dictionary shows images for unfamiliar words. To use this feature, install the free Microsoft Reading Coach application from the Microsoft Store. New! 1With the Draft with Copilot in Word text action, you can quickly turn any recognized text into a full draft. Whether it’s a sentence in an email or a snippet on your screen, press Win + Click on the recognized text, then select Draft with Copilot in Word. No more blank pages. No more writer’s block. Just momentum. To use “Draft with Copilot in Word” a Microsoft 365 Copilot subscription is required. New! 1Click to Do on Copilot+ PCs now supports actions through Microsoft Teams. When you select an email address recognized by Click to Do on your screen, you can choose to send a Teams message or schedule a Teams meeting. These options make it easy to ask a question or set up time to talk without interrupting your workflow.[Settings] New! 1The new agent in Settings is part of the Copilot+ PC experience and is designed to address one of the most common frustrations: finding and changing settings on your PC. You can describe what you need help with, such as “how to control my PC by voice” or “my mouse pointer is too small,” and the agent will suggest steps to resolve the issue. The agent uses AI on your PC to understand your request and, with your permission, can automate and complete tasks for you. This experience is rolling out to Snapdragon-powered Copilot+ PCs, with support for AMD and Intel-powered PCs coming soon. It currently works only if your primary display language is set to English. New! On non-Copilot+ PCs, the Settings app now shows the Search box at the top center to make searching easier and more consistent.Fixed: If your PC is set to ‘Do nothing’ when you close the lid (under Settings > System > Power and Battery) and the Settings window is left open when you close the lid, reopening the lid might cause the Settings window to stop responding. It might become unresponsive to input or resizing and instead just display your accent color.Fixed: Settings might stop responding when you try to save Wi-Fi network credentials.[Windows Resiliency Initiative] The following changes are part of the Windows Resiliency Initiative announced at Ignite 2024: New! Quick machine recovery is now available. When enabled, it automatically detects and fixes widespread issues on Windows 11 devices using the Windows Recovery Environment (WinRE). This reduces downtime and avoids the need for manual fixes. If a device experiences a widespread boot issue, it enters WinRE, connects to the internet, and Microsoft can deliver a targeted fix through Windows Update. IT admins can enable or customize this experience for their organization through the Intune Settings Catalog UI using the RemoteRemediationCSP. There is also a dedicated quick machine recovery settings page available under System > Recovery > Quick machine recovery. Today, it’s enabled by default for home users. New! A more streamlined interface appears during an unexpected restart. This updated design aligns with Windows 11’s visual style and helps you return to work faster. The screen displays a more readable layout while keeping the technical details visible. This screen appears with a black background.[Start menu]New! We are adding a Boolean option to the Configure Start Pins policy to allow admins to apply Start menu pins once. This means that a user will receive admin pins on day 0 but can then make any changes to their Start pinned layout and have those changes safeguarded. These changes can be optionally applied through the existing configuration Service Provider (CSP).[Snap] New! Improvements make it easier to learn and use Snap in Windows 11. Inline messages now appear when you accidentally open the Snap Bar by dragging an app to the upper center of your desktop or open the Snap menu by hovering over the Minimize or Maximize button. These messages provide helpful tips on Snap app windows and show keyboard shortcuts.[Windows Search]New! Windows Search settings are now easier to find. Instead of two separate pages for settings (“Search permissions” and “Searching Windows”), you can find everything in one place under Settings > Privacy & security > Search. This new page has a modern look and a better layout, so you can quickly view and manage all your Windows Search settings.[Input]New! The Gamepad layout of the Windows touch keyboard now includes enhanced controller navigation and improved focus handling for child keys, menus, word suggestions, language switching, and settings. A new Gamepad keyboard, designed for gaming, also supports PIN sign-in on the Windows lock screen. It offers controller shortcuts for quick PIN entry and full navigation for those who prefer not to use shortcuts.[File Explorer]Fixed: If you open More options in File Explorer to view the full list of folders for the current path, the dropdown menu might not display completely, making the bottom part inaccessible.Fixed: File operation progress dialogs might stop appearing when displayed from apps.Fixed: Syncing more SharePoint sites to File Explorer might slow performance when navigating folders or opening the context menu. This can also affect how quickly files launch.[Desktop icons] Fixed: If you have an app pinned to your desktop and it updates, the app icon might not display correctly and instead show a white page.[Notifications] Fixed: When you select a Windows notification, it might not bring the related app to the foreground as expected—for example, this can happen with Outlook notifications. 1 Functionality will vary by device and market; text actions will be available across markets in select character sets. See aka.ms/copilotpluspcs.改良と修正Normal rolloutThis preview update contains fixes and quality improvements from KB5062553 (released July 8, 2025) and KB5064489 (released July 13. 2025). The following summary outlines key issues addressed by the KB update after you install it. Also, included are available new features. The bold text within the brackets indicates the item or area of the change.[Authentication] Fixed: This update addresses an issue that affects the Local Security Authority Subsystem Service (LSASS). LSASS might stop responding during machine password changes with specific audit settings.[File Explorer] Fixed: File Explorer Home might unexpectedly only display a single folder (for example, Desktop), rather than the expected content with recent files and more.[File system] Fixed: This update addresses an issue in the Resilient File System (ReFS) where using backup applications on large files could occasionally result in system memory becoming fully exhausted.[Graphics] An issue where external graphics cards connected through Thunderbolt weren’t always recognized in some cases.[Input (know issue)]Fixed: An issue when using the Microsoft Changjie IME (input method editor) for Traditional Chinese might cause problems such as not being able to form or select words, unresponsive spacebar or blank key, incorrect word output, or a broken candidate window display. This can occur after installing KB5062553.Fixed: This update addresses an issue that affects Phonetic input methods, including the Hindi Phonetic Input keyboard and the Marathi Phonetic keyboard, which might not work correctly after installing KB5062553.[Stability issue] This update addresses an issue observed in rare cases after installing the May 2025 security update and subsequent updates causing devices to experience stability issues. Some devices became unresponsive and stopped responding in specific scenarios.[Windows Firewall] Fixed: This update addresses an issue found in Event Viewer as Event 2042 for Windows Firewall with Advanced Security. The event appears as "Config Read Failed" with the message "More data is available." For more information about this issue, see "Error events are logged for Windows Firewall" in the Windows Health Dashboard.If you installed earlier updates, your device downloads and installs only the new updates contained in this package.既知の不具合更新プログラムには既知の不具合は存在しません。更新プログラムはWindows Updateの他、Microsoft Update Catalogを利用してインストールすることができます。