KB5011831 Fixes Black Screen Issues on Windows 10 21H2

April non-security updates for Windows 10 versions 21H2, 21H1, and 20H2 are now available. You may get this update automatically via Windows Update. If not, visit Microsoft Update Catalog and search for KB5011831. This is a non-security update and hence brings several new bug fixes, and improvements to your device. Installing this patch update will upgrade your Windows 10 PC to 1904x.1682.

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The letter “x” in the above Build number ranges between 2-4 for 20H2, 21H1, and 21H2. This patch update will resolve the black screen issues that used to appear when you sign in or out of your computer. This also resolves an issue that prevents graphics processing unit (GPU) load balancing over Remote Desktop from working as intended. Get to know the whole list of improvements, and fixes in the below changelog. 


KB5011831 Changelog

Here are the key changes and bug fixes on this cumulative update for Windows 10 versions 21H2, 21H1, and 20H2 –

  • Resolves Black Screen Issues for some users when they sign in or sign out. 
  • Improves the servicing for the Secure Boot component of Windows.
  • Works upon and fixes an issue that incorrectly returns Execution Policy settings from the registry.
  • Resolves an issue that fails to pass the Shift KeyUp event to an application when you use the Korean IME.
  • Internet Explorer will not stop working when you copy/paste tet using an Input Method Editor (IME).
  • Fixes an issue that displays the wrong IME mode indicator when the Font Mitigation policy is enabled.
  • You may now copy the security portion of a Group Policy to a machine quite easily without facing any issues. 
  • You may now change your password even when it is expired while signing into a Windows device. 
  • Some users reported facing an issue that cause Windows to stop working. This happens when they apply a Windows Defender Application Control (WDAC) policy that doesn’t require a restart.
  • The news and Interest panel will now not come into appearance until you click, tap, or hover the mouse over it. 
  • Improves Microsoft OneDrive so that it doesn’t lose focus while you rename a file on it and press the Enter key. 
  • Resolves an issue that affects a Server Message Block (SMB) multichannel connection. A few users even reported getting a 13A or C2 error when SMB gets affected. 

Other Bug Fixes and Improvements

  • Fixes an error code 0xc0030009 (RPC_NT_NULL_REF_POINTER) owing to failing Kerberos authentication. This happens when a client machine attempts to use the RDP to connect to another machine while Remote Credential Guard is enabled.
  • Certain Point of Sale terminals will now not experience the occasional OS startup delays during PC reboot for up to 40 minutes.
  • Works upon and fixes an issue that causes a remote desktop session to close or a reconnection to stop responding while waiting on the accessibility shortcut handler (sethc.exe).
  • Reduces the overhead of resource contention in high input/output operations per second (IOPS) scenarios that have many threads contending on a single file.
  • Fixes an issue that triggers the Key Distribution Center (KDC) code to incorrectly return the error message “KDC_ERR_TGT_REVOKED” during domain controller shutdown.
  • Resolves an issue that prevents the instantiation of the Microsoft RDP Client Control, version 11 and higher, inside a Microsoft Foundation Class (MFC) dialog.
  • Fixes an anomaly that causes virtual computer object (VCO) password settings failure on a distributed network name resource.

There are a few other fixes as well. To know them, see the release note provided at the end of this post. 

Known Issues on KB5011831 

Before you proceed ahead to install KB5011831 on your Windows 10 PC, make sure to go through the list of known issues with this patch update. Only when you are comfortable with the known to occur issues, download and install this non-security update. Here’s a list of known issues on this cumulative update –

  • Error PSFX_E_MATCHING_BINARY_MISSING: For more information and a workaround, see KB5005322.
  • If you had installed Windows 10 using custom offline media or ISO images, Microsoft Edge legacy will be removed. However, this will not reinstall the new Microsoft Edge. As a workaround, go and install the latest servicing stack update on your computer. 
  • The recovery discs that were created using the Backup and Restore (Windows 7) app might fail to work in Control Panel after installing KB5011831.
  • You may receive an error message while attempting to connect your device to an untrusted domain using Remote Desktop. The error message is as follows –

Your credentials did not work. The credentials that were used to connect to [device name] did not work. Please enter new credentials.

How to Get this Non-Security Update

As usual, there are two ways from which you may download this optional update and install it on your computer. 

  • Windows Update: Go to Settings > Update & Security, and hit Check for updates. The system will connect to Microsoft’s servers online and download the available patches for your device.
  • Update Catalog: You may visit Microsoft’s official site and get the relevant standalone package. Make sure to pick the update that best matches your system configuration. As the downloaded file is in “.msu” file format, all you require is to double-click on the setup file, and the installation begins. 

Release Notes

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