Patchday: Windows 8.1/Server 2012-Updates (August 11, 2020)

Windows Update[German]On August 11, 2020, Microsoft released various updates for Windows 8.1. These updates are also available for Windows Server 2012 R2. Here is some information about them.


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For Windows 8.1 and Windows Server 2012 R2 a rollup and a security-only update have been released. The update history for Windows 8.1 and Windows Server 2012 R2 can be found on this Microsoft page.

Important: Starting in July 2020 all Windows updates disable the RemoteFX vGPU feature due to the CVE-2020-1036 vulnerability (see also KB4570006). After installing this update, attempts to start virtual machines (VM) with RemoteFX vGPU enabled will fail. More information can be found in the KB article and here.

KB4571703 (Monthly Rollup) for Windows 8.1/Server 2012 R2

Update KB4571703 (Monthly Rollup for Windows 8.1 and Windows Server 2012 R2) contains improvements and fixes, and addresses the following items.

  • Addresses an issue that prevents you from installing some .msi apps. This occurs when a device is managed by a Group Policy that redirects the AppData folder to a network folder.
  • Addresses an issue in Universal Windows Platform (UWP) apps that allows single sign-on authentication when an app does not have the Enterprise Authentication capability. With the release of CVE-2020-1509, UWP applications might begin prompting the user for credentials.
  • Addresses an issue in Microsoft Edge IE Mode when opening multiple documents from a SharePoint site.
  • Addresses an issue in Microsoft Edge IE Mode that occurs when you browse using anchor links.
  • Addresses an issue with loading Browser Helper Objects in Microsoft Edge IE Mode.
  • Addresses an issue where certain applications that rely on the JScript Scripting Engine become unresponsive under load.
  • Security updates to Windows App Platform and Frameworks, Windows Graphics, Windows Media, Windows Shell, Windows Cloud Infrastructure, Windows Authentication, Windows Kernel, Windows Hybrid Cloud Networking, Windows Peripherals, Windows Network Security and Containers, Windows Storage and Filesystems, Windows File Server and Clustering, Windows Hybrid Storage Services, Windows SQL components, Microsoft Scripting Engine, and Windows Remote Desktop.

This update is automatically downloaded and installed by Windows Update, but is also available in the Microsoft Update Catalog and via WSUS. In case of a manual installation, the latest Servicing Stack Update (SSU KB4566425  dated July 14, 2020) must be installed beforehand – but this SSU cannot be uninstalled.

Microsoft is aware of the following problem in connection with the update: Certain operations, such as renaming, that you perform for files or folders on a cluster shared volume (CSV) may fail with the “STATUS_BAD_IMPERSONATION_LEVEL (0xC00000A5)” error. This occurs if you perform the operation on a CSV owner node from a process that does not have administrator privileges. As a workaround, you can do one of the following:

  • Perform the operation from a process that has administrator privileges.
  • Perform the operation from a node that does not have CSV ownership.

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


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KB571723 (Security-only update) for Windows 8.1/Server 2012 R2

Update KB571723 (Security Only Quality Update for Windows 8.1 and Windows Server 2012 R2) addresses the following items.

Security updates to Windows App Platform and Frameworks, Windows Graphics, Windows Media, Windows Shell, Windows Cloud Infrastructure, Windows Authentication, Windows Kernel, Windows Hybrid Cloud Networking, Windows Peripherals, Windows Network Security and Containers, Windows Storage and Filesystems, Windows File Server and Clustering, Windows Hybrid Storage Services, Windows SQL components, Microsoft Scripting Engine, and Windows Remote Desktop.

The update is available via WSUS or in the Microsoft Update Catalog. Details about the update are described in the KB article. For a manual installation, the latest Servicing Stack Update (SSU) KB4566425 must be installed first.

In addition, the security update KB4571687 for IE should also be installed.

Similar articles:
Microsoft Office Patchday (August 4, 2020)
Microsoft Security Update Summary (August 11, 2020)
Patchday: Windows 10-Updates (August 11, 2020)
Patchday: Windows 8.1/Server 2012-Updates (August 11, 2020)
Patchday: Updates for Windows 7/Server 2008 R2 (August 11, 2020)
Patchday Microsoft Office Updates (August 11, 2020)


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1 Response to Patchday: Windows 8.1/Server 2012-Updates (August 11, 2020)

  1. EP says:

    a new out-of-band security update for Windows 8.1 & Server 2012 R2 is available Aug. 19 – KB4578013

    https://support.microsoft.com/help/4578013/

    recent blog about KB4578013 from Askwoody:
    https://www.askwoody.com/2020/microsoft-releases-out-of-band-patch-kb4578013-for-win8-1/

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