Windows 10 21337 is available for insiders in the dev channel - virtual desktops with their own background images

A new Windows 10 Insider is available for download. Today there is build 21337.1000 for insiders in the dev channel, more precisely 10.0.21337.1000 rs_prerelease from 03/12/21. Let's see what's new in this version. 

With the virtual desktops, Microsoft has (now finally) created a possibility that you can assign your own wallpaper to each desktop. The setting for this is directed to Personalization -> Background by right-clicking on the virtual desktop -> select background.

The order of the virtual desktops can now also be changed using Win + Tab.

Auto HDR has now been incorporated for gamers. "When you activate this function on your HDR-capable gaming PC, you automatically get a fantastic HDR display for over 1000 DirectX 11 and DirectX 12 games!"

The file explorer gets a new view. This is called compact mode (is the details setting). “The UX for toggling this setting is not final. The level of the split is designed for better consistency with modern (XAML) experiences. This should also make working with the file explorer easier when using a touchscreen."

• Windows Terminal is now integrated into Windows 10 as an app.
• Power Automate Desktop is now integrated as an app in Windows 10. (Not currently available on ARM devices)
• Notepad as an app has been improved, has got a new icon and is no longer listed in the start menu under Windows accessories, but rather individually.

The main changes:

• We are now rolling out the new IME candidate window design for all Windows Insider I in the Dev Channel with Japanese, Traditional Chinese, and Indian IMEs. We will let you know as soon as the rollout for the remaining IMEs increases.
• We're updating the emoji panel (WIN + period) to support searching in additional languages ​​including Amharic, Belarusian, Cherokee, Filipino, Faroese, Icelandic, Khmer, Mongolian (Cyrillic script), Burmese, Sindhi, Serbian (Cyrillic script ), Serbian (Latin script), Swahili, Thai, Turkmen, Tonga, Uzbek (Latin script) and Cantonese (traditional). Please continue to provide feedback on emoji search results in the Feedback Hub under Input and Language> Emoji Panel.
• Live previews for web pages pinned to the taskbar by Microsoft Edge are now rolled out for all Insiders.
• Not mentioned, but probably there: Windows focus as desktop background is in Windows 10 21337

Known issues in Windows 10 21337

• We are investigating reports that the update process stuck for a long time when trying to install a new build.
• We're working on enabling the new system tray experience for existing pinned web pages. In the meantime, you can detach the webpage from the system tray, remove it from the edge: // apps page, and pin the webpage again.
• [Messages and Interests] We're addressing an issue where Messages and Interests may not be available if you log in to Windows without Internet access, but reappear when you're online.
• [Messages and Interests] Sometimes you cannot use the stylus to exit the Messages and Interests flyout.
• [ARM64] Insiders who have installed the preview version of the Qualcomm Adreno graphics driver on the Surface Pro X may experience a reduced display brightness. This problem will be addressed with an updated version of the preview graphics driver. If you encounter this problem, please refer to the feedback collection for more information.
• We are working to resolve an issue where some devices with Realtek network adapters with driver version 1.0.0.4 may experience a temporary loss of network connectivity.
• We're working to fix an issue where some high refresh rate monitors will only play games at 60Hz. Tearing can also occur on monitors with a variable update rate.
• The network flyout on the login screen does not open in this build, which prevents you from connecting to a new network before logging in. If your account is in a state that requires internet login, the workaround is to establish an Ethernet connection, bring the device within range of a previously configured Wi-Fi network, or use another available account first Sign in.
• We are working on a fix that Insiders reported in the previous build where devices with certain NVMe drives could experience hard drive resets or WHEA_UNCORRECTABLE_ERROR errors. If you were affected by this issue in build 21332, you might want to pause the updates.
• We are investigating reports of an issue with some devices receiving DPC_WATCHDOG_ERROR bug checks. If you were affected by this issue in build 21332, you should pause the updates.

Fixed issues in Windows 10 21337

• We fixed a DWM memory leak affecting Insiders in recent builds.
• We fixed an issue that caused some Insiders to fail when trying to launch Settings via URI, including using the display settings and personalization options when right-clicking on the desktop.
• We fixed an issue where clicking the Advanced Options page under Settings> Update & Security> Windows Update would crash the settings in the previous build.
• We fixed a number of issues that resulted in crashes in many x64 apps on ARM64, especially in scenarios with video or DRM content. Examples of x64 apps that no longer crash include Microsoft Translator, BlueJeans, The CW, Alexa, Astroneer, and Epic Games Launcher.
• We fixed an issue that could result in the Windows security icon in the system tray indicating that action was required but the app was unable to take any action.
• We fixed an issue that could cause the Windows security icon in the system tray to become unresponsive.
• We fixed an issue in recent builds that could cause some games to freeze after locking and unlocking the PC while the game was in full-screen mode. This issue may also have resulted in ALT + Tab freezing.
• We fixed an issue in recent builds that resulted in flickering when hovering the mouse pointer over icons and buttons in certain apps.
• We fixed an issue in recent builds that caused some Insiders with domain-joined devices to unexpectedly lose their app and website credentials when upgrading.
• We fixed an issue resulting in some Insiders' System File Checker (SFC) tool incorrectly showing that it had found corrupt files the first time it was run after every upgrade.
• We fixed an issue that resulted in certain UPSs showing up in Device Manager with error code 43.
• We fixed an issue that could cause werfault.exe to crash.
• We fixed an issue in recent builds that resulted in some Insiders not being able to resume their devices from hibernation or an error check with an IRQL_NOT_LESS_OR_EQUAL error.
• We fixed an issue causing some Insiders to unexpectedly display a Bitlocker recovery screen after upgrading to recent Dev Channel builds.
• We fixed a crash of ctfmon.exe that was affecting the reliability of the voice input (WIN + H).
• We fixed a crash in ctfmon.exe that could occur when switching to a Microsoft IME during a third-party IME reconversion session.
• We fixed an issue in recent builds that could result in Search not opening after clicking the search box in the system tray.
• blogs.windows