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Old files are not removed after a migration of virtual machine storage in Windows 8.1 or Windows Server 2012 R2

This article describes an issue that occurs after you perform a migration of virtual machine storage in Windows 8.1 or Windows Server 2012 R2. An update is available to resolve this issue. Before you install this update, check out the Prerequisites section.
Assume that you try to perform a migration of virtual machine storage from a Cluster Shared Volume (CSV) to another CSV by using Failover Clustering Manager console or Virtual Machine Manager (VMM). After the virtual machine configuration, data files are migrated to another location. However, the files in the old location are not removed.

Note This results in multiple copies of the virtual machine files, and also makes it difficult to track what data was actually moved and what was not.
How to obtain this update
Important Do not install a language pack after you install this update. If you do, the language-specific changes in the update will not be applied, and you will have to reinstall the update. For more information, see Add language packs to Windows.

Method 1: Windows Update

This update is provided as an Optional update from Windows Update.

How to obtain the update from Windows Update

To obtain this update from Windows Update, follow these steps:
  1. Swipe in from the right edge of the screen, and then tap Search. Or, if you are using a mouse, point to the lower-right corner of the screen, and then click Search.
  2. In the search box, type Windows Update, and then tap or click Windows Update.
  3. In the left pane, click Check for updates, and then wait while Windows looks for the latest updates for your computer.
  4. If you see a message telling you that optional updates are available, or telling you to review optional updates, click the message to view the optional updates.
  5. In the list, select the check box for update 3037313 under Optional, and then tap or click Install.
See the frequently asked questions for Windows Update in Windows 8.1.

Method 2: Microsoft Download Center

The following files are available for download from the Microsoft Download Center:
Operating systemUpdate
All supported x64-based versions of Windows 8.1 DownloadDownload the package now.
All supported x64-based versions of Windows Server 2012 R2DownloadDownload the package now.
Note The update for Windows RT 8.1 can be obtained only from Windows Update.

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.

Update detail information


To install 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.

Registry information

To apply this update, you do not have to make any changes to the registry.

Restart requirement

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

Update replacement information

This update does not replace a previously released update.

File information

The global version of this update installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.

Windows 8.1 and Windows Server 2012 R2 file information and 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:
    VersionProductMilestoneService branch
    6.3.960 0.17 xxxWindows 8.1 and Windows Server 2012 R2RTMGDR
  • 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 separately 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.
For all supported x64-based versions of Windows 8.1 or Windows Server 2012 R2
File nameFile versionFile sizeDateTimePlatform

Additional file information

Additional file information for Windows 8.1 and for Windows Server 2012 R2

Additional files for all supported x64-based versions of Windows 8.1 and of Windows Server 2012 R2
File propertyValue
File nameAmd64_9c70d1ff45381393673b26772ae0cf33_31bf3856ad364e35_6.3.9600.17787_none_809868968d6eb25e.manifest
File versionNot applicable
File size703
Date (UTC)01-Apr-2015
Time (UTC)19:40
PlatformNot applicable
File nameAmd64_microsoft-hyper-v-vstack-vmms_31bf3856ad364e35_6.3.9600.17787_none_2757595932e11672.manifest
File versionNot applicable
File size1,296,191
Date (UTC)01-Apr-2015
Time (UTC)19:40
PlatformNot applicable

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.

Article ID: 3037313 - Last Review: 06/09/2015 18:06:00 - Revision: 2.0

Windows Server 2012 R2 Datacenter, Windows Server 2012 R2 Standard, Windows Server 2012 R2 Essentials, Windows Server 2012 R2 Foundation, Windows 8.1 Enterprise, Windows 8.1 Pro, Windows 8.1, Microsoft Hyper-V Server 2012 R2

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