Windows 10 21H2: Microsoft is testing the optional April update


Microsoft has added a non-security update for Windows 10 to the Insider Program. This is the optional April update test. It is now available for Windows 10 21H2 in the release preview channel.

The new update, marked as optional, kicks off for users in the release preview channel in the Insider Program for Windows 10 builds 21H2. Microsoft has also released a similar update for Windows 11 – both updates will soon be released to all Windows users as optional updates and then recommended as a patch day update for all Windows users. users in May. For the release preview channel, there is now a lot to try. The new version has the number 19044.1679 (KB5011831) and, in addition to bug fixes and improvements, also brings something new. However, this is an “under the hood” innovation as Microsoft has added improvements for servicing the Secure Boot component of Windows. So it won’t be obvious to the average consumer at first.
Infographic Windows 11 infographic: The most important innovations

This update fixes a number of issues including crashes and application errors. These are non-security updates. The preview or optional update is the pre-release versions of Windows previously released as C updates. If nothing happens, the bug fixes it contains will be automatically distributed to all users on patch day in May.

Many changes in the preview

Anyone who would already benefit from the bug fixes and want them can already get the update through the Insider program. The update is listed as KB number KB011831. Information about this can currently only be found in the Windows Blog. The Windows team is testing various bug fixes and improvements with this update. The list of changes is very long, we have translated for you the most important bug fixes and the changes that Microsoft announces as highlights:

  • We changed the Azure Active Directory (Azure AD) registration timeout from 60 minutes to 90 minutes for hybrid Azure AD joined Autopilot scenarios. This also fixes a race condition that throws an exception when the timeout expires.
  • We fixed an issue that caused a remote desktop session to close or become unresponsive while waiting for the Accessibility Shortcut Manager (sethc.exe).
  • We fixed an issue that caused the operating system to start up approximately 40 minutes late.
  • Fixed an issue where execution policy settings were not returned correctly from the registry.
  • We fixed an issue that caused Internet Explorer to stop working when copying and pasting text using an input method editor (IME).
  • Fixed an issue that caused some users to see a black screen when logging in or out.
  • We fixed an issue that caused Kerberos authentication to fail and the error was “0xc0030009 (RPC_NT_NULL_REF_POINTER)”. This error occurs when a client computer attempts to connect to another computer using Remote Desktop Protocol (RDP) while Remote Credential Guard is enabled.
  • We fixed an issue that prevented you from changing an expired password when signing in to a Windows device.
  • We fixed an issue that could prevent Windows from working when you apply a Windows Defender Application Control (WDAC) policy that doesn’t require a restart.
  • Fixed an issue where copying the security portion of a Group Policy to a computer could fail.
  • We fixed an issue that caused the Key Distribution Center (KDC) code to incorrectly return a “KDC_ERR_TGT_REVOKED” error message when shutting down the domain controller.
  • Fixed an issue that could prevent Graphics Processing Unit (GPU) load balancing from working as expected through Remote Desktop.
  • Fixed an issue that prevented the Microsoft RDP client control (version 11 and later) from being instantiated in a Microsoft Foundation Class (MFC) dialog.
  • We fixed an issue that could cause a Microsoft OneDrive file to lose focus after renaming it and pressing Enter.
  • Fixed an issue that caused the Messages & Interests panel to appear even if you hadn’t clicked, tapped, or hovered.
  • We fixed an issue where the Shift Up key event was not propagated to an application when using the Korean IME.
  • We fixed an issue that could occur when using Netdom.exe or the Active Directory Domains and Trusts snap-in to enumerate or change name suffix routing. These procedures may fail. The error message is: “There are not enough system resources to complete the requested service.” This issue occurs after installing the January 2022 security update on the Primary Domain Controller Emulator (PDCe).
  • Fixed an issue where the wrong IME mode indicator was displayed when the font dimming policy was enabled.
  • Fixed an issue that caused the primary domain controller (PDC) of the root domain to generate warning and error events in the system log. This issue occurs when the PDC incorrectly attempts to parse only outbound approvals.
  • Fixed an issue where a Server Message Block (SMB) multichannel connection could generate a 13A or C2 error.
  • We fixed an issue that occurs when you map a network drive to a Server Message Block Version 1 (SMBv1) share. After restarting the operating system, you can no longer access this network drive.
  • Fixed an issue that caused Virtual Machine Object (VCO) password settings to fail on a Distributed Network Name resource.
  • Fixed an issue that corrupted a pool when a client-side caching (CSC) cleanup method failed to remove a created resource.
  • We fixed an issue that could cause the server to hang due to non-paged pool growth and consuming all memory. After a restart, the same problem recurs when you try to repair the damage.
  • We reduced resource contention overhead in high input/output operations per second (IOPS) scenarios where many threads are competing for a single file.

Windows 10 Frequently Asked Questions All questions have a full answer

Interesting articles and links about Windows 10 Semi-Annual Updates:


Microsoft, Windows 10, Update, Windows Update, Patch Day, Windows 10 Update

Microsoft, Windows 10, Update, Windows Update, Patch Day, Windows 10 Update

Leave a Comment