Don't Feed the Technician


Direct Download links for KB4056892 is now available for all devices with Windows 10 Fall Creators Update. This is an emergency patch that addresses the major security flaw in Intel, AMD and ARM CPUs. You can also download KB4056892 offline installer from the company’s official website to update all of your devices at the same time.

Windows 10 Build 16299.192 (KB4056892) is available for general public and it includes other bug fixes as well. You can update your PC by navigating to Settings -> Update & Security -> Windows Update and Check for updates.

KB4056892 Download Links for Windows 10

Windows 10 KB4056892 Direct Download Links: 64-bit (x64)32-bit (x86).

Once Downloaded this can be installed by running the following command (this example is x64 just change the msu file name for x86):

wusa.exe C:\KB4056892\windows10.0-kb4056892-x64_a41a378cf9ae609152b505c40e691ca1228e28ea.msu

or to run a silent install run:

wusa.exe C:\KB4056892\windows10.0-kb4056892-x64_a41a378cf9ae609152b505c40e691ca1228e28ea.msu /quiet 

and to suppress the reboot (although a reboot is required to finish the install, so will need to be done asap)

wusa.exe C:\KB4056892\windows10.0-kb4056892-x64_a41a378cf9ae609152b505c40e691ca1228e28ea6.msu /quiet /norestart


For Windows 7, 8, and 8.1 – Windows 7 KB4056897 and Windows 8.1 KB4056898 now available for download


Improvements and fixes

This update includes quality improvements. No new operating system features are being introduced in this update. Key changes include:

  • Addresses issue where event logs stop receiving events when a maximum file size policy is applied to the channel.
  • Addresses issue where printing an Office Online document in Microsoft Edge fails.
  • Addresses issue where the touch keyboard doesn’t support the standard layout for 109 keyboards.
  • Addresses video playback issues in applications such as Microsoft Edge that affect some devices when playing back video on a monitor and a secondary, duplicated display.
  • Addresses issue where Microsoft Edge stops responding for up to 3 seconds while displaying content from a software rendering path.
  • Addresses issue where only 4 TB of memory is shown as available in Task Manager in Windows Server version 1709 when more memory is actually installed, configured, and available.
  • Addresses issue where update installation may stop at 99% and may show elevated CPU or disk utilization. This occurs if a device was reset using the Reset this PC functionality after installing KB4054022.
  • Security updates to Windows SMB Server, the Windows Subsystem for Linux, Windows Kernel, Windows Datacenter Networking, Windows Graphics, Microsoft Edge, Internet Explorer, and the Microsoft Scripting Engine.

If you installed earlier updates, only the new fixes contained in this package will be downloaded and installed on your device.

For more information about the resolved security vulnerabilities, see the Security Update Guide.

Known issues in this update

Symptom Workaround
Windows Update History reports that KB4054517 failed to install because of Error 0x80070643. Even though the update was successfully installed, Windows Update incorrectly reports that the update failed to install. To verify the installation, select Check for Updates to confirm that there are no additional updates available.

You can also type About your PC in the Search box on your taskbar to confirm that your device is using the expected OS build.

Microsoft is working on a resolution and will provide an update in an upcoming release.

When calling CoInitializeSecurity, the call will fail if passing RPC_C_IMP_LEVEL_NONE under certain conditions.

When calling CoInitializeSecurity, the call may fail when passing RPC_C_AUTHN_LEVEL_NONE as the authentication level. The error returned on failure is STATUS_BAD_IMPERSONATION_LEVEL.

Change the authentication level parameter to RPC_C_AUTHN_LEVEL_CALL.

Microsoft is working on a resolution and will provide an update in an upcoming release.

Due to an issue with some versions of Anti-Virus software, this fix is only being made applicable to the machines where the Anti virus ISV has updated the ALLOW REGKEY.

Contact your Anti-Virus AV to confirm that their software is compatible and have set the following REGKEY on the machine


Value Name=”cadca5fe-87d3-4b96-b7fb-a231484277cc”





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