Windows 11 KB5012643 is now available for download for all users, with a few notable changes and a host of additional bug fixes. The new update is distributed via Windows Update and WSUS as always. However, you can also manually install Windows 11 KB5012643 via offline installers. Offline installation files can be useful when users are unable to install the patch using normal methods.

Windows 11 KB5012643 update arrived as an optional cumulative preview update and is set to test the changes expected to arrive with the Tuesday May 2022 Update. Like other optional updates, this cumulative update is not automatically downloaded and installed on your system unless you check and manually initiate the download.

This isn’t a huge release, but a few quality improvements have been made. For example, Microsoft added a new feature to display the temperature above the weather icon added to the taskbar with the April 2022 Update.

Microsoft fixed an issue where the operating system misaligned video subtitles and another bug where video subtitles were partially cut off. However, changes have been made so that users can use Windows window controls such as minimize, maximize, and close buttons more efficiently. Let’s take a closer look at what awaits us:

  • Fixed an issue that could cause video subtitles to be partially cut off.
  • Fixed an issue that misaligned video subtitles.
  • Temperatures are now displayed above the weather icon in the taskbar.
  • Fixed a memory leak issue affecting Windows systems that are in use 24 hours a day, weekdays.
  • Fixed an issue that prevented you from using the minimize, maximize, and close buttons in a maximized application window.
  • Improvements have been made to the Secure Boot feature of Windows.
  • Fixed issue affecting Tidollarse attribute in Microsoft Edge IE mode.
  • Fixed an issue where the AppX Deployment Service (AppXSvc) stopped working after installing certain MSIX applications.
  • Addressed a problem early in the startup process that could cause a stop error.
  • Developed Autopilot client to handle updated Trusted Platform Module (TPM) features that support self-ticket deployment and pre-provision scenarios.
  • Azure Active Directory (Azure AD) registration timeout for hybrid Azure AD joined Auto Piot scenarios has changed from 60 minutes to 90 minutes.
  • Resolved an issue where certain Point of Sale terminals did not experience occasional OS startup delays of up to 40 minutes on reboot.
  • Resolved an issue affecting amic Host Configuration Protocol (DHCP) option 119 (Domain Lookup Option) by preventing the use of the connection-specific DNS Suffix Search List.
  • Fixed issue where mobile device management (MDM) policies were not allowed on Windows Enterprise editions upgraded to Enterprise using Azure AD joined subscription entitlement.
  • Fixed an issue that caused Kerberos authentication to fail: “0xc0030009 (RPC_NT_NULL_REF_POINTER)” error message. This issue occurred when a client machine tried to use Remote Desktop Protocol (RDP) to connect to another machine with Remote Credential Protection enabled.
  • Fixed an issue where Windows would go into BitLocker recovery after a service update.
  • Fixed an issue that prevented the Endorsement Key (EK) certificate from being retrieved from the TPM device.
  • Fixed an issue where the security partition of Group Policy could not be copied to a machine.
  • Fixed an issue that prevented instantiation of Microsoft RDP Client Control, version 11 and later, within the Microsoft Foundation Class (MFC) dialog.
  • Fixed an issue that could occur when you use Netdom.exe or the Active Directory Domains and Trusts snap-in to list or change the name suffixes redirection: Error message: “There are insufficient system resources to complete the requested service.”
  • Fixed an issue where the root domain’s primary domain dendollarsealer (PDC) was generating warning and error events in the System log.
  • Fixed an issue when you mapped a network drive to a Server Message Block version 1 (SMBv1) share. With the issue, users were unable to access that network drive after restarting the operating system.
  • Fixed issue affecting SMB multi-channel connection that could generate error 13A or C2.
  • Fixed an issue that damaged the pool when the Client Side Caching (CSC) cleanup method could not delete a created resource.
  • Fixed an issue that could cause the server to lock out because the nonpaged pool grows and uses all memory. After a reboot, the same issue occurred again when you tried to repair the damage.
  • Reduced load in high input/output operations per second (IOPS) scenarios when multiple threads are working on a single file.

This optional update is available through Windows Update in Settings. However, you can download the .msu offline install package from the Microsoft Update Catalog links below.

Additionally, the update package download is now much easier in browsers such as Google Chrome. Previously, Microsoft offered updates in the Update Catalog via the insecure connection HTTP. As a result, Google blocked users from opening the .msu file directly in the current tab. Update links are now served over HTTPS and Google no longer prevents users from opening .msu download links.

  • Windows 11 KB5012643 Direct Download Links: 64-bit.

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