Slow performance when you connect to a WebDAV shared folder in Windows 8 or Window Server 2012

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Article ID: 2782826 - View products that this article applies to.
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Symptoms

Assume that you try to access a Web Distributed Authoring and Versioning (WebDAV) shared folder by using a standard user account on a Windows 8 or Windows Server 2012-based computer. In this situation, the enumeration of the files and directories is slower than expected.

Notes
  • The enumeration is slower than expected when you access the same WebDAV shared folder from a Windows 7-based computer.
  • The enumeration is especially slow when the WebDAV shared folder contains many files and subdirectories.


Cause

This issue occurs because the WebClient service queries the WinInet cache for an applicable cookie more frequently than necessary. The result of the query is sent back to the WebClient class through the remote procedure call protocol (RPC) instead of the Windows Internet (WinInet) API. Therefore, the enumeration of the files and directories is slower than expected.

Resolution

Hotfix information

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 this specific problem.

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, submit a request to 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, visit the following Microsoft website:
http://support.microsoft.com/contactus/?ws=support
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.

Prerequisites

To apply this hotfix, you must be running Windows 8 or Windows Server 2012.

Registry information

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

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

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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 and Windows Server 2012 file information notes
Important Windows 8 hotfixes and Windows Server 2012 hotfixes are included in the same packages. However, only "Windows 8" 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" 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:
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    VersionProductMilestoneService branch
    6.2.920 0.20 xxxWindows 8 and Windows Server 2012RTMLDR
  • 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 and Windows Server 2012" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely 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 x86-based versions of Windows 8
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File nameFile versionFile sizeDateTimePlatform
Webclnt.dll6.2.9200.20569198,14427-Nov-201204:23x86
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For all supported x64-based versions of Windows 8 and of Windows Server 2012
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File nameFile versionFile sizeDateTimePlatform
Webclnt.dll6.2.9200.20569226,81627-Nov-201204:27x64
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Status

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

More information

For more information about WebDAV, go to the following Microsoft website:
General information about WebDAV
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

Additional file information

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Additional file information for Windows 8 and Windows Server 2012

Additional files for all supported x86-based versions of Windows 8
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File nameX86_be1ba6dfb05b87a95e634ae4b5c59671_31bf3856ad364e35_6.2.9200.20569_none_6d555792447746d6.manifest
File versionNot applicable
File size709
Date (UTC)27-Nov-2012
Time (UTC)21:02
PlatformNot applicable
File nameX86_microsoft-windows-webdavredir-webclient_31bf3856ad364e35_6.2.9200.20569_none_527515989e214c04.manifest
File versionNot applicable
File size2,452
Date (UTC)27-Nov-2012
Time (UTC)05:34
PlatformNot applicable
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Additional files for all supported x64-based versions of Windows 8 and of Windows Server 2012
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File nameAmd64_67d8f228bbb2a1bb0ee8f3ca6d4e323c_31bf3856ad364e35_6.2.9200.20569_none_aef6987dbe54fb5c.manifest
File versionNot applicable
File size1,066
Date (UTC)27-Nov-2012
Time (UTC)21:02
PlatformNot applicable
File nameAmd64_854eb5bf5afce285b22099a530cc9364_31bf3856ad364e35_6.2.9200.20569_none_630c870fd805b517.manifest
File versionNot applicable
File size713
Date (UTC)27-Nov-2012
Time (UTC)21:02
PlatformNot applicable
File nameAmd64_be1ba6dfb05b87a95e634ae4b5c59671_31bf3856ad364e35_6.2.9200.20569_none_c973f315fcd4b80c.manifest
File versionNot applicable
File size711
Date (UTC)27-Nov-2012
Time (UTC)21:02
PlatformNot applicable
File nameAmd64_microsoft-windows-webdavredir-webclient_31bf3856ad364e35_6.2.9200.20569_none_ae93b11c567ebd3a.manifest
File versionNot applicable
File size2,456
Date (UTC)27-Nov-2012
Time (UTC)06:43
PlatformNot applicable
File nameX86_microsoft-windows-webdavredir-webclient_31bf3856ad364e35_6.2.9200.20569_none_527515989e214c04.manifest
File versionNot applicable
File size2,452
Date (UTC)27-Nov-2012
Time (UTC)05:34
PlatformNot applicable
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Properties

Article ID: 2782826 - Last Review: January 9, 2013 - Revision: 1.0
Applies to
  • Windows 8
  • Windows 8 Enterprise
  • Windows 8 Pro
  • Windows Server 2012 Datacenter
  • Windows Server 2012 Standard
  • Windows Server 2012 Foundation
  • Windows Server 2012 Essentials
Keywords: 
kbautohotfix kbqfe kbhotfixserver kbfix kbsurveynew kbexpertiseadvanced KB2782826

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