Build 26340.9354: Windows Insider Experimental Channel, September 2026. Narrator math reading and per-display Magnifier controls

For: Insiders using cross-device resume

• When you resume a webpage from your phone and its browser isn't installed on your PC, you can open the page in your PC's default browser or install the phone's browser.¹

For: Insiders signed in with a Microsoft account

• The Device Info Card is expanding to more markets. It shows a quick view of your PC's specifications and usage, with a link to more details in Settings.²
  Available to Windows Insiders signed in with a Microsoft account.

For: Insiders using Windows Settings

• Camera, microphone, and location privacy controls are grouped more clearly, with usage information brought onto the page.³

For: Families using parental controls

• Messages are clearer when age-restricted parental controls block an application.⁴

For: Insiders using the taskbar

• Taskbar preview animations transition more smoothly between app groups.⁵

For: Insiders searching in File Explorer

• File search results show key details, such as a file's name, location, and date, in a more consistent layout.⁶

• Volume sliders show audio activity while sound is playing.⁷
• An option to allow hardware acceleration appears in an audio device's Advanced properties when the device supports it.⁸
• You can configure exclusive mode for an audio device in its Advanced properties instead of going to Control Panel.⁹
• You can configure adaptive communication sound levels directly in Settings. They reduce the volume of other sounds when communication activity is detected.¹⁰
• The option to set an audio device as the default for communication always appears in its properties; it is unavailable when the device is already the default.¹¹
• The text explaining how to allow audio devices is clearer.¹²
• A banner explains that some sound properties do not take effect while mono audio is on.¹³
• Input and output audio properties now include jack information for devices that need it.¹⁷

For: Insiders managing sound devices

• You can change default sound devices from the All sound devices page.¹⁴
• The All sound devices page lets you filter the list to input or output devices.¹⁵
• New toggles let you show or hide disabled, disconnected, and unplugged devices.¹⁶

• The Ebrima font supports the Garay and Beria Erfe writing systems.¹⁸
  Garay was encoded in Unicode 16.0 and Beria Erfe in Unicode 17.0.
• Adlam glyph designs are updated to reflect the current Unicode standard and improve consistency.¹⁹

For: Insiders using Print Management

• The modernized Print Management experience is temporarily unavailable in Insider Preview builds while it is refined. Existing Print Management tools remain available.²⁰
  The updated experience is planned to return in a future build.

For: Insiders using Notification Center

• Dismissed notification tips, including tips that time out, can be found later in Notification Center.²¹

For: Insiders using the taskbar

• Taskbar app preview windows respond correctly when you switch between dark and light mode.²²

For: Some Insiders using portrait monitors

• The mouse cursor no longer moves in the wrong direction on portrait monitors for some Insiders after the latest flights.²³

For: Some Insiders with Admin Protection enabled

• For some Insiders, the UAC dialog appears when Admin Protection is enabled, addressing an issue from the previous flight.²⁴

For: Some Insiders launching or closing certain apps

• Some Insiders no longer see a SYSTEM SERVICE EXCEPTION bug check after the previous flight when launching or closing certain apps.²⁵

For: Insiders who use Narrator, including people who are blind or have low vision

• Narrator can read math equations aloud in supported Microsoft 365 apps, including Word and PowerPoint. Math navigation lets you move through parts of an equation, such as fractions, exponents, and roots.²⁶
  Press Narrator key + Alt + N to enter math navigation and Esc to exit.

For: Insiders using Magnifier with multiple displays

• Each display can have its own zoom level, so magnification stays within that screen instead of spanning all your displays.²⁷
  Per-monitor zoom is on by default. Use Extend, not Duplicate, in System > Display. Adjust zoom with Windows key + Plus or Minus, Ctrl + Alt and the mouse wheel, Magnifier settings, or the toolbar.
• You can lock a display's magnified view so it stays in place while you move your pointer to another screen.²⁸
  Press Ctrl + Windows key + K while pointing at a screen to lock or unlock it. Press Windows key + Esc to release all locks.

For: People setting up a Windows PC

• At the end of setup, you can optionally have Windows guide you through installing apps, personalizing your PC, and getting up to date. You can skip Assisted Setup and go directly to the desktop.²⁹