Hyper-V integration components update for Windows virtual machines

This article describes an update for the latest integrated components for Windows virtual machines (VMs) that are running on a Windows 10-based or Windows Server 2016-based host, or a Windows Server 2012 R2-based host. This update is available on Windows Server 2012 R2, Windows Server 2012, and Windows Server 2008 R2 Service Pack 1 (SP1)-based Hyper-V guest. Before you install this update, check out the Prerequisites section.

Issue 1

Consider the following scenario:

  • You connect a VM to a virtual switch that uses a physical adapter.

  • You enable the single-root I/O virtualization (SR-IOV) option in Virtual Switch Manager.

  • You disable the physical adapter on the Hyper-V guest while network I/O is running on the VM.

In this scenario, the VM crashes.

Issue 2

The current Write Ahead Logging (WAL) implementation incorrectly assumes that the Virtual Hard Disk (VHD) ownership never changes. However, the ownership does change in multiple VM group replication in a shared VHD scenario.

You can get this update through Windows Update and the Microsoft Download Center. Even though this issue has only been observed in Windows Server 2012 R2, Windows Server 2012, or Windows Server 2008 R2 SP1, the update also applies to Windows 8.1 and Windows 7 SP1.

Important If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.

This update is provided as a Recommended update on Windows Update. For more information on how to run Windows Update, see How to get an update through Windows Update.

The following files are available for download from the Microsoft Download Center.

Operating system

Update

All supported x86-based versions of Windows 8.1

Download Download the package now.

All supported x64-based versions of Windows 8.1

Download Download the package now.

All supported x64-based versions of Windows Server 2012 R2

Download Download the package now.

All supported x64-based versions of Windows Server 2012

Download Download the package now.

All supported x86-based versions of Windows 7

Download Download the package now.

All supported x64-based versions of Windows 7

Download Download the package now.

All supported x64-based versions of Windows Server 2008 R2

Download Download the package now.

Note This download is not self-installing. Please see Managing Hyper-V Integration Services for guidance on how to manage and install integrated components. To start the download, click the Download button.

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 How to obtain Microsoft support files from online services Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

To apply this update, you must have April 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 (2919355) installed in Windows 8.1 or Windows Server 2012 R2. Or, install Service Pack 1 for Windows 7 or Windows Server 2008 R2.

To use the update in this package, you don't have to make any changes to the registry.

You may have to restart the computer after you apply this update.

This update doesn't replace a previously released update.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

See the terminology that Microsoft uses to describe software updates.

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