Windows 11 build 25236.1000

10.0.25236.1000.rs_prerelease.221028-1618

Build of Copper
OS family	Windows 11 (NT 10.0)
Version number	10.0
Build number	25236
Build revision	1000
Architecture	AMD64, ARM64
Build lab	rs_prerelease
Compiled on	2022-10-28
Expiration date
Timebomb	2023-09-15 (+322 days)
SKUs
Home (N, Single Language, China) SE (N) Pro (N, Single Language, China) Pro Education (N) Pro for Workstations (N) Education (N) Enterprise (Evaluation, G, GN, N, N Evaluation) IoT Enterprise Team
About dialog

Windows 11 build 25236.1000 is the thirtieth Insider Preview and the twenty-fourth available client build of Copper, the 23H1 development semester of Windows as a service. It was released to Windows Insiders in the Dev Channel on 2 November 2022, along with its server counterpart. It is the last available client build to be based on the Copper codebase, as builds 25240+ switched to the Zinc codebase.

New features and changes

Shell

The tips on how to use Windows Search via the taskbar have been introduced to a subset of users in the English (United States) language.

Settings

• If a UPS is connected, the battery graph under the Power & Battery page will be hidden.
• The text on Accounts > Other users > Kiosk has been updated to inform users to set up a kiosk if needed.

Narrator

The ability to announce the pinned and unpinned status of apps in the taskbar has been added.

Miscellaneous

• The EFI application variant of Boot Manager, bootmgfw.efi, was updated from build 25174 (unknown branch, signed on 30 July 2022) to build 25222 (unknown branch, signed on 8 October 2022), and contains code (unrelated to the EFI-to-boot-environment initialization code that is only present in EFI application variants of boot applications) that hasn't been pulled into rs_prerelease yet (not included in bootmgr.efi).
• The statically-linked ReFS driver in bootmgr.efi was updated.

Bugfixes

General

Fixed an issue that was causing the SYSTEM_THREAD_EXCEPTION_NOT_HANDLED bugcheck in certain cases.

Taskbar

• Fixed an issue where opening the hidden icons flyout would cause a File Explorer entry for it to appear in the taskbar.
• Fixed an issue that was causing the taskbar previews to freeze or show as blank and not open when pressing ⊞ Win+# to try and switch between windows.
• Fixed an issue that was causing the show hidden icons flyout in the system tray to not responsively resize with changes with empty spaces and columns.
• Fixed multiple issues related to the taskbar which were impacting explorer.exe reliability.
• Fixed an issue that was causing the volume icon in the system tray to incorrectly show as muted.
• Fixed a GDI handle leak related to updating the notification center icon in the taskbar, which would eventually lead to an explorer.exe crash for users who received a large number of notifications.

File Explorer

• Fixed an issue that was causing File Explorer to crash when closing tabs.
• Fixed an issue that was causing errant divider lines in the navigation pane.

Settings

• Fixed an issue when going into the properties for an input device, the device would unexpectedly show in the output devices list under System > Sound.
• Fixed an issue that was causing the inverted option under Accessibility > Color filters to work incorrectly and unexpectedly set the device to grayscale colors.

Narrator

Fixed an issue that was causing natural voices to not speak in Narrator.

Bugs and quirks

General

• The audio may stop working in certain cases.
• Several apps may crash on launch in certain cases.
• Users may encounter a SYSTEM_SERVICE_EXCEPTION bugcheck with win32kfull.sys when interacting with UI components in WinPE or WinRE.
• Switching projection modes using ⊞ Win+P or the Project section of Quick Settings may not work properly.

Taskbar

• The taskbar may sometimes flash when transitioning between desktop posture and tablet posture.
• The taskbar may sometimes stay stuck in the expanded state instead of dismissing to collapsed state when using the bottom right edge gesture to see Quick Settings.
• The notification badges may appear larger than normal in certain cases.

Shell

• Various UI elements in apps may disappear and reappear repeatedly.
• The text cursor may appear white on white when hovering over text fields.
• Several apps, such as Microsoft Edge, may unexpectedly show thick lines on the side of the window.
• Several Chat apps may not flash with new messages or open a preview on hover in the system tray.
• The navigation headings of Start's all apps list may contain garbled text in the Simplified Chinese language.
• On some locales, the default font used in several UI elements (such as the date and time on the taskbar) may change to regular Segoe UI instead of Segoe UI Variable.
• On some locales, some strings may appear pseudo-localized.

Widgets

On right-to-left locales, the content may animate out of view before the Widgets board resizes when clicking to expanded view of the Widgets board.

Virtualization

• Users may experience a UNSUPPORTED_PROCESSOR bugcheck when booting Windows in VMware on a Hyper-V enabled host with 2 or more cores allocated.
• The system may fail to boot in VMware with attached network adapters.

Safe mode

• Quick Settings and date/time clock on the taskbar may be missing due to the Capability Access Manager Service service not running.
• Clicking Bluetooth & devices and Personalization pages may crash the Settings app due to an overrun of a stack-based buffer 0xc0000409.

Updates

• 25236.1010.rs_prerelease_flt.221028-1637 (KB5021116)
  • Released to the Dev Channel on 4 November 2022 (AMD64 and ARM64)

Gallery

• 

  Boot screen

External links

• Official announcement