Assume that you install update 2919355
on a Windows 8.1-based or Windows Server 2012 R2-based computer. When you try to back up some Hyper-V virtual machines that reside on cluster shared volumes, you receive an error message that indicates the backup request has failed.
Here is a sample of the error messages that you may encounter when this issue occurs:
Csv writer is in failed state with unexpected error
The error message that an end-user will see is surfaced by the backup vendor products, and therefore it will vary by vendor.
To resolve this issue, install the update or hotfix that is described in this article.
How to obtain this update
Method 1: Windows Update
This update is available from Windows Update
Method 2: Microsoft Download Center
The following files are available for download from the Microsoft Download Center:
For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
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.
Method 3: Update Rollup Package
The following update rollup is available:
October 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2
A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.
If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix. Note
If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, go to the following Microsoft website: Note
The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.
To apply this update or hotfix, you must be running Windows 8.1 and Windows Server 2012 R2, and have the update 2919355 installed.
For more information about how to obtain update 2919355, click the following article number to view the article in the Microsoft Knowledge Base:
Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 Update April, 2014
To apply this update or hotfix, you do not have to make any changes to the registry.
You may have to restart the computer after you apply this update or hotfix.
Hotfix replacement information
This hotfix does not replace a previously released hotfix.
The global version of this hotfix 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 notes
Windows 8.1 hotfixes and Windows Server 2012 R2 hotfixes are included in the same packages. However, only "Windows 8.1" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 8.1" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.
- 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 0.16xxx||Windows 8.1 and Windows Server 2012 R2||RTM||GDR|
|6.3.960 0.17 xxx||Windows 8.1 and Windows Server 2012 R2 ||RTM ||GDR |
- The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows 8.1 and Windows Server 2012 R2" 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 and of Windows Server 2012 R2
|File name||File version||File size||Date||Time||Platform|
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.