Hyper-V guest may freeze when it is running failover cluster service together with shared VHDX in Windows Server 2012 R2

This article describes an issue that occurs when a Hyper-V guest is running failover cluster service together with a shared virtual hard disk (VHDX) in Windows Server 2012 R2. Before you install this update, see the Prerequisites section.

When this issue occurs, the Hyper-V guest is still registered as running in both Hyper-V manager and Failover Cluster manager. Therefore, the service in the cluster role doesn't failover to the passive guest cluster node correctly.

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 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.

For more information about how to download Microsoft support files, select 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 install this update, you should first install April 2014, update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 (2919355) in Windows Server 2012 R2.

To apply this update, 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.

Learn about the terminology that Microsoft uses to describe software updates.

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables.

Notes

  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    Version

    Product

    Milestone

    Service branch

    6.3.960 0.18 xxx

    Windows 8.1 and Windows Server 2012 R2

    RTM

    GDR

  • GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.

  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed in the "Additional file information" section. MUM, MANIFEST, and the associated security catalog (.cat) files, are very important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.

x64 Windows 8.1 and Windows Server 2012 R2

File name

File version

File size

Date

Time

Platform

Pvhdparser.sys

6.3.9600.18229

27,136

05-Feb-2016

14:46

x64


x64 Windows 8.1 and Windows Server 2012 R2

File property

Value

File name

Amd64_075f3451b68b4847ba1649f5b825ca3f_31bf3856ad364e35_6.3.9600.18229_none_432680fa4b2bcc7d.manifest

File version

Not applicable

File size

703

Date (UTC)

05-Feb-2016

Time (UTC)

19:02

Platform

Not applicable

File name

Amd64_microsoft-hyper-v-pvhd-parser_31bf3856ad364e35_6.3.9600.18229_none_7a7e6ee5ae0f078a.manifest

File version

Not applicable

File size

3,908

Date (UTC)

05-Feb-2016

Time (UTC)

15:47

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

2,272

Date (UTC)

05-Feb-2016

Time (UTC)

19:02

Platform

Not applicable


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