KB5007186 Security Update Windows 10 21H1, 20H2, & 2004

Windows 10 21H1, 20H2, and 2004 platforms now have a new cumulative update KB5005611 that contains bug fixes and quality improvements. Accordingly, the build numbers for respective Windows versions 21H1, 20H2, and 2004 will increase to 19041.1266, 19042.1266, and 19043.1266. There are a few issues with the system applications that have been addressed with this update.

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Patch Tuesday is the day on which Microsoft rolls out its latest security updates for Windows; KB5007186 is part of the Patch Tuesday cycle. The update includes both newly released fixes and fixes that were previously made available. If you are still on version 20H2, you will get Windows 10 Build 19042.1348. For users of the 2004 version, this will be the last security patch for consumer editions.

Patch Tuesday

KB5007186 Changelog

Microsoft has now released the second last security update for Windows 10 versions 21H1, 20H2, and 2004. This update is available through Windows Update. Furthermore, a direct download link has also been released for the offline installers of Windows 10 KB5007186.

You’ll see the following changes once you’ve installed KB5005611 on your device:

Windows 10 Version 21H2 and 21H1

This quality update includes the following key changes:

  • Microsoft has included all of the improvements from Windows 10, version 2004 in this build.
  • The build does not have any other issues.

Windows 10 Version 2004

The key changes in this quality update are as follows:

  • Resolves an issue where some apps may have unexpected results when rendering certain user interface elements or when drawing inside the app. If you are using an app that uses GDI+, and it sets a zero (0) width pen object, or if the app uses scaling, you may encounter this issue.

Note: – The HoloLens update (OS Build 19041.1169) that was released November 9, 2021, is also included in this release. Microsoft HoloLens that are not updated to the latest OS Build will receive a Windows Update client update that will improve the reliability of Windows Update.

Known Issues for KB5007186 

1. Symptom

Microsoft Edge Legacy may not be installed on devices with Windows installations based on custom offline media or custom ISO images. The updated version of Microsoft Edge does not automatically replace it on these devices. In this case, you’ll encounter the issue if you slipstream the update into a custom offline media or ISO image without first installing the standalone servicing stack update.


In order to avoid this issue, slipstream the SSU into the custom offline media first before slipstreaming the LCU on March 29, 2021. To do this using the combined SSU and LCU packages now used for Windows 10 versions 20H2 and 2004, you must extract the SSU file from the combined package.

2. Symptom

It has been reported that some devices do not allow the installation of new updates after the June 21, 2021 (KB5003690) update was installed. This includes the July 6, 2021 (KB5004945) update and later updates. If this error occurs, you will receive the following response: “PSFX_E_MATCHING_BINARY_MISSING”.


Microsoft is working on this problem.

3. Symptom

If you install this update, you may not be able to connect to devices in untrusted domains when using Smart Card Authentication in Remote Desktop. At this time, a message might appear stating, “Your credentials did not work. The credentials that were used to connect to [device name] did not work. Please enter new credentials.” and “The login attempt failed.” in red.


This problem can be resolved by using Known Issue Rollback (KIR). In some cases, the resolution may take up to 24 hours to propagate automatically to non-managed devices like personal devices and business devices. It is possible that restarting your Windows device will help it accept the resolution more quickly.

4. Symptom

Upon installing this update, you may run into the following errors when connecting to a Windows print server shared remote printer:

  1. 0x000006e4 (RPC_S_CANNOT_SUPPORT)
  2. 0x0000007c (ERROR_INVALID_LEVEL)


The following is a list of workarounds and current status for Windows release health:

1] OS Build 19041.1288

2] OS Build 19042.1288

3] OS Build 19043.1288

Note: Connection problems with printers occur mainly on print servers and are not common on personal devices. Enterprises and organizations are more often affected by issues related to printing.

How to get KB5007186 Update

 As part of the latest cumulative update (LCU), Microsoft includes the latest servicing stack update (SSU) for your operating system. These are the methods you can use to download KB5007186 cumulative updates.

1] Windows Update

To download the KB5007186 security update, use the following steps:

  • Open the Windows Press the Windows+I keys to launch the Settings.
  • Select Windows Update from the left pane of the screen.
  • Now go to the right pane and click Check for Updates.

This will download and install the update automatically. When it has finished downloading, restart your computer to complete the installation.

2] Microsoft Update Catalog

Alternatively, Microsoft Update Catalog can be used manually if the automatic search fails to locate the pending patch. To do this, follow these steps:

  • Go to the Microsoft Update catalog page.
  • Type in KB5007186 in the search field and press Enter. It will open the available updates list.
  • Now choose your system architecture (x86, ARM64, x64) then click on the Download button.
  • On the following screen, click the top link to begin downloading the KB5007186.
  • When the download is complete, right-click the “.MSU” file and select Install.

3] Windows Server Update Services (WSUS)

These are the configuration to get the update with WSUS –

  • Product: Windows 10, version 1903 and later

  • Classification: Security Updates

Release Note

Tip: If you are facing update, activation, or driver issues on your Windows PC, try RESTORO PC Repair Tool.This software will scan your device for potential issues and resolve them automatically.


  1. 21/11/2021
    I am not a developer. I cannot see how to download a patch that will fix being unable to print since last year. I have an HP machine bought 2019, which runs Windows 10.

    Also I got a recent message telling me I can’t upgrade to Windows 11 on this computer.

    Thanks for some comment
    Nina Swift

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