Windows 11 Build 22000.651 (KB5012643) Fixes Startup Delays

Previously, Microsoft released the same updates to the Beta and Release Preview channels for the Insiders. However, they have recently released the same updates on the Beta and the Dev channel, giving the Insiders a unique opportunity to switch to the Beta channel for a limited time.

That said, Microsoft has released KB5012643 to the Release Preview channel (alone) for Windows 11. This update does not include any new features for the OS, but certainly includes many fixes. This hints that Microsoft is ready to offer an optional update to Windows 11 users on a stable channel in the next week or so.

This release focuses primarily on improving the operating system’s startup time, which could often be up to 40 minutes in some cases! In addition, improvements to servicing the Secure Boot component of Windows have also been made.

Let us continue to see what other fixes and improvements have been made before we show you how to install this release.

Updates and Fixes

The following lists all the improvements made to KB5012643 for Windows 11:

  • Improvements have been made to servicing the Secure Boot component of Windows.
  • An issue that delays OS startup by approximately 40 minutes has been taken care of.
  • An issue that causes the AppX Deployment Service (AppXSvc) to stop working after you install certain MSIX apps has been fixed.
  • A race condition that occurs early in the startup process that could cause a stop error has been addressed.
  • Autopilot client to process updated Trusted Platform Module (TPM) capabilities that support self-deployment and pre-provisioning scenarios has been improved.
  • Microsoft has changed the timeout for Azure Active Directory (AAD) registration from 60 minutes to 90 minutes for hybrid Azure AD-joined Autopilot scenarios. This also deals with a race condition that causes an exception at timeout.
  • A memory leak issue that affects Windows systems that are used 24 hours a day of the week has been addressed.
  • An issue that affects the Dynamic Host Configuration Protocol (DHCP) option 119 (Domain Search List) by preventing the use of the connection-specific DNS Suffix Search List has been fixed.
  • An issue that affects the Title attribute in Microsoft Edge IE mode has been addressed.
  • An issue in which Mobile Device Management (MDM) policies were not allowed on Windows Enterprise editions upgraded to Enterprise using Azure AD-joined subscription entitlement has been fixed.
  • An issue that could cause video subtitles to be partially cut off has been addressed.
  • An issue that incorrectly aligns video subtitles has been fixed.
  • An issue that causes Kerberos authentication to fail, and the error is “0xc0030009 (RPC_NT_NULL_REF_POINTER),” has been fixed.
  • An issue that causes Windows to go into BitLocker recovery after a servicing update has been mitigated.
  • An issue preventing retrieval of the Endorsement Key (EK) certificate from the TPM device has been addressed.
  • An issue that might fail to copy the security portion of a Group Policy to a machine has been fixed.
  • An issue that prevents the instantiation of the Microsoft RDP Client Control, version 11 and higher, inside a Microsoft Foundation Class (MFC) dialog, has been fixed.
  • The temperature on top of the weather icon on the taskbar will now be displayed.
  • An issue that prevents you from using the minimize, maximize, and close buttons on a maximized app window has been addressed.
  • An issue that might occur when you use Netdom.exe or the Active Directory Domains and Trusts snap-in to list or modify name suffixes routing has been addressed.
  • An issue that causes the Primary Domain Controller (PDC) of the root domain to generate warning and error events in the System log has been mitigated.
  • An issue that occurs when you map a network drive to a Server Message Block version 1 (SMBv1) share has been addressed.
  • An issue that affects an SMB multichannel connection and could generate a 13A or C2 error has been fixed.
  • An issue that damages the pool when the Client-Side Caching (CSC) cleanup method fails to delete a resource created has been fixed.
  • An issue that could cause the server to lock up, because the non-paged pool grows and uses all memory, has been taken care of.
  • The overhead of resource contention in high input/output operations per second (IOPS) scenarios with many threads contending on a single file has been reduced.

How to Install Windows 11 KB5012643 (22000.651)

To install this update, you need to be running Windows 11 and subscribed to the Release Preview channel. If you have enabled Windows updates, you will automatically get a “New features are ready to install” prompt.

If not, follow these steps to install KB5012643:

  1. Navigate to the Settings app and then click Windows Update on the left.

  2. Here, click Check for updates on the right side of the window.

    check for updates Windows 11
    Check for pending updates
  3. You will then see the following update available under Updates available to download:

    2022-04 Update for Windows 11 for x64-based Systems (KB5012643)

    Click Download and install.

    Download now
    Begin downloading the update
  4. The update will now begin to download and then install. Once complete, click Restart Now.

    Restart now 5
    Restart PC

Once the computer restarts, you can verify that the OS has been updated by typing in winver in the Run Command box.

Updated 5
KB5012643 installed successfully

Rollback/Remove Windows 11 Insider Preview Update

If you do not wish to keep the installed preview update for some reason, you can always roll back to the previous build of the OS. However, this can only be performed within the next 10 days after installing the new update.

To roll back after 10 days, you will need to apply this trick.

Cleanup After Installing Windows Updates

If you want to save space after installing Windows updates, you can run the following commands one after the other in Command Prompt with administrative privileges:

DISM.exe /Online /Cleanup-Image /AnalyzeComponentStore
DISM.exe /Online /Cleanup-Image /StartComponentCleanup
dism cleanup
DISM cleanup

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