Microsoftは7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 26200.5722(KB5062669)」をリリースしました(Windows Blog)。Windows 11 Insider Preview Build 26120.5722 (Beta Channel)もリリースされており、変更内容はほぼ同じです。Dev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。特定のリリースとは直接結びつけられておらず、ビルドに含まれる新機能や改善点は、準備が整い次第、将来のWindowsリリースに反映される可能性があります。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 26200.5722の新機能Build 26200.5722では、AMD/Intelプロセッサを搭載したCopilot+ PC向けに設定画面のAIエージェント機能が導入されています。また通知センターがセカンダリモニターでも表示可能となりました。カレンダーの上部に秒表示つきの大きな時計を表示するオプションも利用可能となります。リリースノートは以下の通りです。New Copilot+ PC experiencesIntroducing the new agent in Settings rolling out for AMD and Intel®-powered Copilot+ PCsWe are rolling out the new agent in Settings experience for AMD and Intel®-powered Copilot+ PCs. This experience is designed to help solve one of the most common frustrations we heard: finding and changing settings on your PC. With this update to Settings, you will be able to simply describe what you need help with like, “how to control my PC by voice” or “my mouse pointer is too small” and the agent will recommend the right steps you can take to address the issue. An agent uses AI on your PC to understand your intent and with your permission, automate and execute tasks on your behalf. Please note that this experience works if your primary display language is set to English.FEEDBACK: Please file feedback in Feedback Hub (WIN + F) under Settings > All other settings.Changes and Improvements gradually being rolled out to the Dev Channel with toggle on*[General]Some Windows Insiders in the Dev and Beta Channels will see a refreshed SCOOBE screen (Second Chance Out of Box Experience) for reviewing recommended settings on your PC. This redesigned screen is meant to be more intuitive and streamlined, allowing you to choose the recommended settings you want for your PC without having to navigate through multiple setup screens. If you see this screen, let us know if you have any feedback via Feedback Hub.[Click to Do (Preview)]The following changes and improvements are rolling out for Click to Do on Copilot+ PCs:We are beginning to roll out a new tutorial for Click to Do. When you launch Click to Do for the first time, you’ll be offered a quick interactive tutorial that shows you how to accomplish tasks faster. During the tutorial, you’ll take actions on both text and images, so you’ll know how to quickly get a summary of a large block of text or remove the background from an image. You can revisit the tutorial at any time by selecting …, then Start tutorial.[Taskbar & System Tray]We are making a change to how quickly Windows can apply enterprise pins to the taskbar when initiated by the IT admins. We want to reduce the gap between an IT admin applying the pinning policy and when their users see a pin on their taskbar. Today, the policy only applies when explorer restarts. With this change, the gap is only up to ~8 hours (policy refresh interval) and sidesteps the explorer restart requirement.[Search on the Taskbar]In the left pane of the search results in the Windows Search box on the taskbar, we are introducing a new grid view to help you more quickly and accurately identify the desired image within your search.[Lock screen]We have made some updates to the UI for configuring widgets on the lock screen under Settings > Personalization > Lock screen.[Notification Center]To address your feedback, we are extending the functionality of Notification Center to secondary monitors. This means you will be able to see your calendar on any of your monitors as well as the option to show a bigger clock with seconds above calendar. You will be able to open Notification Center on any monitor by clicking the date and time in the system tray of your taskbar.[Task Manager]After disabling to fix some issues, we are beginning to roll out the change the way Task Manager calculates CPU utilization for the Processes, Performance, and Users pages again to Windows Insiders in the Dev and Beta Channels. Task Manager will now use the standard metrics to display CPU workload consistently across all pages and aligning with industry standards and third-party tools. For backward compatibility, a new optional column called CPU Utility is available (hidden by default) on the Details tab showing the previous CPU value used on the Processes page.Fixes gradually being rolled out to the Dev Channel with toggle on*[Taskbar]Fixed an issue where the Task View icon in the taskbar might be unexpectedly invisible if you turned it off and back on in Settings (the space was reserved and you could click it to open Task View, but nothing showed in the space).Fixed a race condition which could lead to the Widgets icon not displaying in the taskbar although it was enabled in Settings (no space reserved, clicking the area did nothing).[Login and lock]Fixed an issue which was causing the text for lock screen widgets to be unreadable in some cases because it was white on a light background.Did some work to address an underlying issue which could lead to the taskbar being slow to load when unlocking your PC after coming out of sleep. This issue could also have led to the password field and other login screen contents not rendering when transitioning from lock screen to login screen after sleep. If you continue experiencing issues, please report them in the Feedback Hub under Install and Update > Logon hangs.[File Explorer]Fixed an issue where if you tried to use the unblock open in Properties for a file, it will still show as blocked when you opened Properties the next time.[Start menu]Fixed an issue for those with the new Start menu where if you used touch to navigate the new Start menu, it wasn’t working reliably. For example, it didn’t support the swipe-up gesture.[Input]Fixed an issue which was causing the Microsoft Changjie Input method to not work properly in the previous build.Fixed an issue which was causing phonetic keyboards, such as the Hindi Phonetic Input keyboard and the Marathi Phonetic keyboard, to not work properly in the previous build.[Administrator Protection]Fixed an underlying issue where the Xbox app wouldn’t launch when administrator protection was enabled. This may have also impacted other apps too, showing error 0xC0000142 or 0xC0000045.[Settings]Fixed an issue where under Settings > System > Storage > Disks and Volumes there might show a link for BitLocker drive encryption although it wasn’t supported in that case. Clicking it would result in BitLocker opening and displaying error 0x80004005.[Other]Fixed an issue causing Insiders to see multiple error pop ups about unexpected elements when opening Group Policy Editor.Fixed an underlying issue causing a small number of Insiders to experience a bugcheck with error DRIVER_IRQL_NOT_LESS_OR_EQUAL in the latest builds.Fixed an underlying issue impacting installers for certain apps on ARM64 PCs, which could result in a long stall during the installation process.Fixes for everyone in the Dev Channel[Graphics]Fixed an issue where external graphics cards connected over Thunderbolt were unexpectedly not discoverable in some cases.Known issues[General]Some Windows Insiders may experience a rollback trying to install this update with a 0x80070005 in Windows Update. We’re working on a fix for Windows Insiders impacted. If you are impacted, using Settings > System > Recovery > “Fix issues using Windows update” may resolve the issue.[Live Captions]Live captions may crash when attempting to use live translation on a Copilot+ PC.[Xbox Controllers]Some Insiders are experiencing an issue where using their Xbox Controller via Bluetooth is causing their PC to bugcheck. Here is how to resolve the issue. Open Device Manager by searching for it via the search box on your taskbar. Once Device Manager is open, click on “View” and then “Devices by Driver”. Find the driver named “oemXXX.inf (XboxGameControllerDriver.inf)” where the “XXX” will be a specific number on your PC. Right-click on that driver and click “Uninstall”.[Click to Do (Preview)]The following known issues will be fixed in future updates to Windows Insiders:Windows Insiders on AMD or Intel®-powered Copilot+ PCs may experience long wait times on the first attempt to perform intelligent text actions in Click to Do after a new build or model update.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。