Windows 10 Insider Preview 21343.1000 (rs_prerelease)

Good morning, friends! Microsoft has released a new pre-build of Windows 10 under the number 21343 for Windows Insider program participants using the Dev channel.

Windows 10 Insider Preview 21343.1000 rs prerelease 210320 1757
Windows 10 Insider Preview 21343.1000 rs prerelease 210320 1757

Full build number: Windows 10 Insider Preview 21343.1000 (rs_prerelease) 210320-1757

We remind you that the Dev channel releases a build that can contain quite unpleasant errors. If you need more stability, we recommend switching to the Beta or Release Preview channels.


New icons in the ” Explorer»

Last year, Microsoft began updating icons in Windows 10, starting the process with pre-installed apps. Recently, the icons for “Windows Security”, “Screen Announcer” and “Notepad” have changed. Now the company is ready to take the next step by updating many of the system icons used in the “Explorer”.

Note that after upgrading to this build, all user folders pinned in the Quick Access section will disappear. You can either remember from before updating, and then re-pin from in the section, or pause receiving updates until the problem is fixed.

file explorer icons
file explorer icons

Windows Sandbox and Application Guard in Microsoft Defender take advantage of the special container technology integrated into Windows 10.

Previously, the container’s runtime environment corresponded to the host. Starting with build 21343, the company introduces a new runtime environment that is specifically designed and optimized for containers. It provides a faster startup of both Windows Sandbox and Application Guard in Microsoft Defender.

pictures folder2x
pictures folder2x

It’s also worth adding that Windows Sandbox now includes a new Chromium-based Microsoft Edge browser. Instructions for getting started with Windows Sandbox can be found on the official website.

Changes and improvements

  • The name of the Windows Administration Tools folder in the Start menu has been changed to Windows Tools. The company is working to better organize all the administration tools and system utilities in Windows 10.
  • [News and Interests] The taskbar widget is now available to users from China. Please note that the process of distributing the feature to insiders continues, so the widget is not available to all users.
  • The new design of the IME candidate window is now available to all insiders on the Dev channel using simplified Chinese.
  • The “Get Help” link on the touch keyboard has been renamed to “Learn more”.
  • The file renaming feature in File Explorer now supports using CTRL + < left arrow> / to move the cursor between words in the file name, as well as CTRL + Delete and CTRL + Backspace to quickly delete words.
  • Some changes have been made to the sections related to Windows network connections so that the symbols displayed there also use the new system icons that were recently added to the insider builds on the Dev channel.
  • If a problem with connecting to your account is detected on the General Features page, the notification will be sent directly to the Notification Center. There will be no more repeated pop-up notifications about this.

Bug Fixes

  • Fixed an issue where devices with some NVMe drives could reload the disk or display a GSOD with the WHEA_UNCORRECTABLE_ERROR error.
  • Fixed an issue that caused GSOD to occur on some devices with the DPC_WATCHDOG_ERROR error.
  • Fixed an issue where some devices with Realtek network adapters with the driver version could periodically interrupt the Internet connection.
  • [News and Interests] Fixed an issue where in some cases the text on the News and Interests button used an incorrect high-contrast colour.
  • [News & Interests] Fixed an issue where the News & Interests widget might not be available when logging in to Windows without an Internet connection, but would reappear when connected to the network.
  • [News and interests] Several fixes have been made to improve performance and stability. explorer.exe
  • Fixed an issue that caused the crash explorer.exe with code 1002.
  • Fixed a memory leak when interacting with the”Bucket”.
  • Fixed an issue related to indexing and observed in recent builds on the Dev channel, which could not launch the Start menu and other applications when the system first booted up after the update.
  • Fixed an issue where games could only run at 60 Hz on some monitors with a high refresh rate. Also, due to this problem, the monitors with the Variable Refresh Rate function could have image breaks.
  • Fixed a major issue that recently caused some apps to crash while installing other apps, and possibly other consequences.
  • Fixed a major issue that caused some apps to unexpectedly display the message “You need to restart your computer for the new settings to take effect”.
  • Fixed an issue that in previous builds caused blurry text to be displayed on additional monitors running in portrait orientation.
  • Fixed an issue that affected the stability of the WIN + Shift + / combinations.
  • Fixed an issue where the memory size information for high-capacity disks could be truncated in the Properties dialogue box in File Explorer.
  • Fixed an issue where text in the panel at the top of the Settings app window was clipped in some languages.
  • A change was made to fix an issue that caused the profile image to flicker in the panel at the top of the Settings application window when resizing the window.
  • Fixed an issue where the volume controls in the “Sound” section in “Settings” could stop working after changing the output device.
  • Fixed an issue where the Network Status page in the Settings app was missing the Properties and Data Usage buttons.
  • Fixed an issue where the search result for “Advanced Touchpad Gesture Options” would launch the Options app but not open a specific settings page.
  • Fixed an issue that caused the Settings app to crash after double-clicking the Windows Update icon on the taskbar.
  • Fixed an issue where Azure Data Studio could not upgrade to a newer version on the ARM64 platform.
  • Fixed an issue that caused Ngen.exe couldn’t recompile the binaries .NET Framework on the ARM64 platform.
  • Fixed an issue where some child keys of the touch keyboard were clipped.
  • Fixed an issue where pressing the top row of the touch keyboard keys would not insert the corresponding digit when using the compact touch keyboard layout.
  • Fixed an issue that could cause an issue with the display of the IME candidate window after switching between a dark and light theme.
  • Fixed an issue where Japanese IME could be disabled after entering a very long line of text.
  • Fixed an issue where Excel couldn’t use SHIFT + when entering text using Japanese IME.
  • Fixed an issue with Japanese IME that could not enter a sentence starting with “ã‚’” if Kana input mode was selected.

Known issues

  • [Games] There is an issue in this build that may cause some games to crash, save syncing may not work if you are playing on a different device, or data may not be saved when you install a new game. Engineers are working to fix this problem. If you believe that the problem may affect you, we recommend that you suspend receiving updates until the patch is released to prevent possible data corruption.
  • [Explorer] After installing this build, all the folders pinned in the “Quick Access” section will disappear. Before updating, pay attention to what is pinned there, so that after the update you can find these folders again.
  • [Explorer] Some insiders may encounter a problem that will cause the “Quick Access” section to be missing. If you are affected by this issue, delete the file %appdata% MicrosoftWindowsRecentautomaticDestinationsf01b4d95cf55d32a. automatic destination-ms. After that, the section will return, but the items that were attached will be deleted. Engineers are working to fix this problem.
  • We are investigating reports that the system update process may hang for a long time when trying to install a new build.
  • Engineers are working on enabling a new taskbar feature for already pinned websites. However, you can unpin the site from the taskbar, remove it from the edge://apps page, and then re-pin it.
  • [News and Interests] The Esc key closes the pop-up window, not the context menu called up inside the pop-up window.
  • [News and interests] Sometimes the pop-up window of news and interesting information cannot be closed with a pen.
  • [ARM64] Insiders who installed a preview version of the Qualcomm Adreno graphics driver on the Surface Pro X may experience reduced display brightness. This issue has been fixed in the updated preview version of the graphics driver, which you can find at the link: If you encounter this problem, then check out the topic in the “Feedback Center” at this link.
  • The Network pop-up menu on the login screen does not open on this build, which means you will not be able to connect to the new network before logging in. If your account requires an Internet connection to log in, you can work around the problem by connecting to Ethernet or moving the device to a previously configured Wi-Fi network. You can also log in with any other available account.
  • There is a problem in this build that the handwriting panel will not work on devices with ARM64 processors.
  • There is an issue in this build that some insiders may have caused the “Search” popup to crash when it starts. Engineers are working on a fix.
I wish you a successful update!

I am Sanjit Gupta. I have completed my BMS then MMS both in marketing. I even did a diploma in computer software and Digital Marketing.

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