Windows 10 Insider Preview Dev Build 21387.1 (co_release) - May 21 Insider

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    Windows 10 Insider Preview Dev Build 21387.1 (co_release) - May 21

    Windows 10 Insider Preview Dev Build 21387.1 (co_release) - May 21

    Dev Channel (Fast ring)
    Category: Insider
    Last Updated: 26 May 2021 at 12:05

    UPDATE 5/26: Windows 10 Insider Preview Dev Build 21390.1 (co_release) - May 26


    Hello Windows Insiders, today we are releasing Windows 10 Insider Preview Build 21387 to Windows Insiders in the Dev Channel.

    Changes and Improvements


    Fixes

    • We fixed an issue in the previous flight where during the upgrade and in the welcome screens displayed after first sign in, the text was unexpectedly using the Times New Roman font.
    • We fixed an issue resulting in some Insiders seeing errors when trying to launch Notepad via the Run dialog.
    • We fixed an issue for WSL users, preventing some Linux GUI apps from launching correctly via the shortcut that is automatically added to Start menu.
    • We fixed an issue resulting in the reset or change PIN workflows not working.
    • We fixed an issue where for some Insiders, night light was immediately turning off after being enabled.
    • We fixed an issue in recent flights where you might unexpectedly get a “We can’t find an audio device” error when trying to play audio from a connected Bluetooth speaker.
    • We fixed an issue where explorer.exe might crash after repeated use of the touchpad gesture for switching Virtual Desktops.
    • We fixed two issues impacting the ability to print using USB printers.
    • We fixed an issue resulting in the Windows Update page potentially becoming unresponsive after clicking Pause Updates.
    • We fixed an issue causing some devices to fail with error code 0xc1900101. While this fix will resolve the problem on some devices, there is a second issue causing the same error code (noted below). We’re working on a fix for this issue as well.
    • We fixed an issue where some devices were re-offered the .NET update after it is installed. After taking this build you should no longer be reoffered the .NET update. If you experience and issue getting Build 21387 because of a pending .NET update, you can work around the issue by pausing then un-pausing updates.
    • We fixed an issue where some devices would crash with a DPC_WATCHDOG_VIOLATION error when using OneDrive Personal Vault.
    • We fixed a ctfmon.exe crash when using ATOK (a third-party IME) if reconversion was triggered in some win32 apps.

    Known issues

    • The Windows Camera App currently does not respect the default brightness setting set via the new Camera Settings page.
    • We’re investigating an issue where elements of Search (including the search box in File Explorer) are no longer displaying correctly in dark theme.
    • [News and interests] We’re investigating an issue where the flyout may occasionally flash in the top left corner of your screen after clicking the button on your taskbar.
    • We’re working on a fix for a second issue causing some devices to fail when updating to this build with error code 0xc1900101. When the update fails, it will roll back to the previous build. If you are encountering this issue, we recommend pausing updates until we release a build with the fix.

    Important Insider Links

    You can check out our Windows Insider Program documentation here, including a list of all the new features and updates released in builds so far. Are you not seeing any of the features listed for this build? Check your Windows Insider Settings to make sure you’re in the Dev Channel. Submit feedback here to let us know if things weren’t working the way you expected.

    If you want a complete look at what build is in which Insider channel, head over to Flight Hub. Please note, there will be a slight delay between when a build is flighted and when Flight Hub is updated.

    Thanks,
    Amanda & Brandon


    Source: Announcing Windows 10 Insider Preview Build 21387 | Windows Insider Blog
    Brink's Avatar Posted By: Brink
    21 May 2021


  1. Posts : 68,668
    64-bit Windows 11 Pro for Workstations
       #1

    Windows 10 Insider Preview Dev Build 21387.1 (co_release) - May 21-21387.jpg
      My Computers


  2. Posts : 3,352
    Windows 10 Pro x64
       #2

    Installing now
      My Computer


  3. Posts : 50,055
    Windows 10 Home 64bit 21H1 and insider builds
       #3

    Installing.
      My Computer


  4. Posts : 30,530
    Windows 10 (Pro and Insider Pro)
       #4

    kado897 said:
    Installing.
    You're fast I have to download it first
      My Computers


  5. Posts : 50,055
    Windows 10 Home 64bit 21H1 and insider builds
       #5

    AndreTen said:
    You're fast I have to download it first
    I ambushed it at 18:00 BST.
      My Computer


  6. Posts : 4,769
    Windows 10 preview 64-bit Home
       #6

    Windows 10 Insider Preview Dev Build 21387.1 (co_release) - May 21-image.png
      My Computers


  7. Posts : 30,530
    Windows 10 (Pro and Insider Pro)
       #7

    kado897 said:
    I ambushed it at 18:00 BST.
    OK, I'm at installing now too. 40 %
      My Computers


  8. Posts : 19,516
    W11+W11 Developer Insider + Linux
       #8

    Windows 10 Insider Preview Dev Build 21387.1 (co_release) - May 21-image.png
      My Computers


  9. Posts : 7,128
    Windows 10 Pro Insider
       #9

    I have to wait until I finnish setting my new desktop. Some of my paid programs are a pain trying to get installed and activated. A couple of them have to be deactivated first. Right now I'm trying to find out if I can deactivate Minitool Partition Wizard Pro and install it to the new desktop. Once done I'll make a Macrium image and join it to the Insider ring. I will update my laptop sometime tonight or tomorrow.
      My Computers


 

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