Windows 10 build 21337.1000 Rs_Prerelease Pushed to Dev Channel

New update Windows 10 build 21337.1000 Rs_Prerelease pushed to Dev Channel (21H2) with several new features.

Windows 10 build 21337.1000

Windows Insider members in the Dev channel have received a feature-rich update that also fixes oodles of issues. This is Windows 10 build 21337.1000 that carries new attributes for Virtual desktop, File Explorer, HDR settings, and more.

You can install the newly rolled out build automatically through Windows update.

Windows 10 build 21337.1000 Rs_Prerelease

Here is the changelog –


New options to reorder and customize Virtual Desktops

The new version enables you to customize and reorder the background for each of the Virtual Desktops (Win+Tab). Here are how –

How to Change Virtual Desktop background –

  1. Go to Settings => Personalization => Background, click a background and set a new background for the active Virtual Desktop.
  2. You will notice a new option to change the background for a specific Virtual Desktop in this page.
  3. The change of background will be reflected in the preview thumbnail on Task View.
Windows 10 build 21337.1000 virtual desktop

How to Reorder Virtual Desktops –

  1. Access Task View using Win+Tab and create multiple new Virtual Desktops.
  2. Now, drag and drop one to another position in the list.
  3. Right click a thumbnail and select Move right or Move left in the context menu.
  4. Set focus on the preferred Virtual Desktop and press ALT+Shift+Left/Right Arrow to move it in either direction in the list.

Setting for Auto HDR Preview for PC

Windows 10 build 21337.1000 comes up with a preview of Auto HDR for your PC gaming experience. Now you will be able to automatically see HDR visuals on an extra 1000+ DirectX 12 and DirectX 11 games. Know more details on the DirectX blog post.

Additions for File Explorer Layout

File Explorer brings an Option Use compact mode to restore the classic layout. The UX for toggling this setting has not been finalized yet. The padding level is based on (XAML) experiences and designed for improved consistency. The feature is aimed to make File Explorer easy working on touch screen devices.

Windows 10 build 21337.1000 file explorer layout

Updates for Inbox app

The build comes with some modifications in existing inbox apps and adding some new ones.

Update Notepad from Microsoft Store

You have the ability to update Notepad through Microsoft Store except for major OS updates. This app has a now new icon you can notice on the Start menu out of the Windows Accessories folder.

notepad icon

Inclusion of Windows Terminal as an inbox app

With the effect of this build, Windows Terminal is included as an inbox app. You know this is a robust, modern, productive, and efficient terminal app for those who use command line tools and shells, for example, CMD, PowerShell, and WSL.  It has plural number of tabs, panes, Unicode as well as UTF-8 character support, AND text rendering engine based on GPU. The tool offers custom themes, configurations, and styles. You can receive updates for Windows Terminal via Microsoft Store.

Windows 10 build 21337.1000 terminal

Advent of Power Automate Desktop

Windows 10 build 21337.1000 Rs_Prerelease brings Power Automate Desktop as a new inbox app that enables you to automate win32 and web applications on your desktop using keyboard input and mouse clicks. Using this tool, you are able to combine these actions with predefined support for applications like MS word to help automate repetitive tasks. You can locate this new automation tool within the Windows Accessories folder from the Start menu.

Power Automate App Icon

Updating WordPad integrations

The current build has also some small modifications for Word or Notepad.

Changes in the build

  • They are pushing the new IME candidate window design to all Insiders opting for Dev Channel using Chinese Traditional, Indic IMEs, and Japanese. They’ll inform you when the rollout for the remaining IMEs increases.
  • Windows 10 build 21337.1000 Rs_Prerelease is updating the emoji panel to support searching in additional languages that include Belarus, Cherokee, Faroese, Icelandic, Amharic, Khmer, Mongolian (Cyrillic script), Burmese, Sindhi, Serbian (Cyrillic script), Serbian (Latin script), Swahili, Thai, Turkmen, Tonga, Filipino, zbek (Latin script), Amharic, and Cantonese (Traditional).
  • Live previews for sites pinned to the taskbar from the built-in browser are now rolling out for all Insiders.
  • Choices located on the taskbar right click menu Touch Keyboard button, Windows Ink Workspace, and Task View are shifted to Settings => Personalization => Taskbar.

Windows 10 build 21337.1000 Bug Fixes

  • The current build fixed a DWM memory leak impacting Insiders in recent flights.
  • Experts of Windows insider fixed errors that appear when trying to launch Settings via URI, furthermore when using the Display Settings and Personalization options on the desktop right click.
  • They fixed Advanced Options => Settings => Update & Security => Windows Update would crash Settings that occurred in the previous flight.
  • They fixed multiple problems that caused crashes in many x64 apps on ARM64, particularly in scenarios involving video or DRM content. Instances of x64 apps no longer crashing include Epic Games Launcher, Microsoft Translator, Alexa, BlueJeans, The CW, Astroneer.
  • They fixed Windows Security icon in the system tray on taskbar showing – “an action was needed”, but the app had no actions to take.
  • They fixed the Windows Security icon in the taskbar as being unresponsive.
  • Also, they fixed some games in full screen mode, freezing after locking and unlocking PC. They may also freeze when using ALT + Tab.
  • They fixed flickering that occurred when hovering over icons and buttons in certain apps.
  • Windows 10 Build 21337.1000 fixed credentials for apps and websites would unexpectedly be missing on upgrade that occurred in recent flights for some Insiders with domain joined devices.
  • The update fixed SFC saying it found corrupt files the first time it was run after each upgrade.
  • The new version fixed UPS showing up in Device Manager with error code 43.
  • Dev channel rollout fixed werfault.exe crashes.
  • The professionals fixed IRQL_NOT_LESS_OR_EQUAL bug check that occurred when resuming devices from sleep in recent builds.
  • They fixed the Bitlocker recovery screen unexpectedly appearing after upgrading to recent Dev Channel updates.
  • Furthermore, they fixed a ctfmon.exe crash impacting the voice typing (WIN + H) reliability.
  • The experts fixed a ctfmon.exe crash that could take place when you switched to a Microsoft IME while in a 3rd party IME reconversion session.
  • Finally, they fixed Search not opening after clicking the search box in the taskbar occurring in previous few updates.

Known issues

  • They are looking into complaints of the update process hanging for longer when installing a new build.
  • The taskbar experience for present pinned sites is being enabled. Although, currently you can unpin the website, delete it from the “edge://apps” page, and then re-pin the same.
  • The professionals there are addressing news and interests that may not be available when signing into Windows without internet access but returns when online.
  • Occasionally you cannot close the flyout of news and interests with pen.
  • Surface Pro X users may encounter less brightness who installed Qualcomm Adreno graphics driver. You can download the graphics driver from to fix this problem. If it still persists, see the feedback collection to know more.
  • They are working on a resolution for intermittent loss of network connectivity on the devices which have Realtek network adapters driver version installed.
  • They are trying to fix games will only run at 60Hz on some high-refresh-rate monitors. In addition, Variable-refresh-rate monitor scenarios may also end up with tearing.
  • On the login screen, you cannot open the network flyout on the login screen. In case, you have urgent work that requires internet then plug in Ethernet or bring the computer in a range of an earlier configured Wifi network, or log in with another available account.
  • They are working on the fix for WHEA_UNCORRECTABLE_ERROR bug checks or disk resets that occur on the devices having some NVMe drives. If you were affected by this error on Build 21332.1000, you may want to pause updates.
  • We’re investigating reports of an issue with some devices receiving DPC_WATCHDOG_ERROR bugchecks. If you were impacted by this on Build 21332, you may want to pause updates.

Source – Windows blog.

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Topics:  Windows Insider
About Sunita
Love to play with Windows 11 and 10. Suggestion - Going for Registry change or system files edit then remember to take a backup or create a restore point before Starting.