Article ID: 2885976 - View products that this article applies to.
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Symptoms

Consider the following scenario:
  • You have a computer that is running Windows 8, Windows Server 2012, Windows 7 Service Pack 1 (SP1), or Windows Server 2008 R2 SP1.
  • The computer uses the Windows Filtering Platform (WFP), or a WFP-based antivirus product is installed on the computer.
  • A user application tries to establish a network connection.
In this scenario, the user application freezes.

Cause

This issue occurs because WFP does not decrease a required reference count in the connection reauthorization path. 

You have a WFP provider with multiple callouts or two WFP providers with one or more callouts, and these callouts are registered at the Application Layer Enforcement (ALE) connect layer. When a user application tries to establish a network connection, the callouts are triggered. The first callout pends the connection and then completes the request. Then, a reauthorization of the connection is triggered. The second callout pends the reauthorization of the connection and then completes the request. However, the WFP never decreases the required reference count in the reauthorization path. Therefore, the network connection stalls.

Resolution

This hotfix is also available at Microsoft Update Catalog.

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 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, 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 one of the following operating systems:
  • Windows 8
  • Windows Server 2012
  • Windows 7 SP1
  • Windows Server 2008 R2 SP1
For more information about how to obtain a Windows 7 or Windows Server 2008 R2 service pack, click the following article number to view the article in the Microsoft Knowledge Base:
976932 Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2

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 7 and Windows Server 2008 R2 file information notes
Important Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" 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, SR_Level (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
    6.1.760 0.17xxxWindows 7 and Windows Server 2008 R2SP1GDR
    6.1.760 1.22xxxWindows 7 and Windows Server 2008 R2SP1LDR
  • 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 for Windows 7 and for Windows Server 2008 R2" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintaining the state of the updated component. 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 7
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File nameFile versionFile sizeDateTimePlatform
Netio.sys6.1.7601.17939240,49622-Aug-201217:16x86
Netio.sys6.1.7601.22441240,57604-Sep-201302:01x86
Fwpkclnt.sys6.1.7601.18042187,75203-Jan-201305:04x86
Tcpip.sys6.1.7601.182511,294,27204-Sep-201301:53x86
Fwpkclnt.sys6.1.7601.22441187,84004-Sep-201302:01x86
Tcpip.sys6.1.7601.224411,309,12004-Sep-201302:01x86
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For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
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File nameFile versionFile sizeDateTimePlatform
Netio.sys6.1.7601.17939376,68822-Aug-201218:12x64
Netio.sys6.1.7601.22441376,76804-Sep-201302:28x64
Fwpkclnt.sys6.1.7601.18042288,08803-Jan-201306:00x64
Tcpip.sys6.1.7601.182511,906,11204-Sep-201313:00x64
Fwpkclnt.sys6.1.7601.22441288,19204-Sep-201302:28x64
Tcpip.sys6.1.7601.224411,901,50404-Sep-201302:28x64
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For all supported IA-64-based versions of Windows Server 2008 R2
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File nameFile versionFile sizeDateTimePlatform
Netio.sys6.1.7601.17939711,02422-Aug-201216:51IA-64
Netio.sys6.1.7601.22441711,10404-Sep-201301:38IA-64
Fwpkclnt.sys6.1.7601.18042482,15203-Jan-201304:45IA-64
Tcpip.sys6.1.7601.182513,791,29604-Sep-201301:29IA-64
Fwpkclnt.sys6.1.7601.22441482,24004-Sep-201301:38IA-64
Tcpip.sys6.1.7601.224413,823,04004-Sep-201301:38IA-64
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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:
    Collapse this tableExpand this table
    VersionProductMilestoneService branch
    6.2.920 0.16 xxxWindows 8 and Windows Server 2012RTMGDR
    6.2.920 0.20 xxxWindows 8 and Windows Server 2012RTMLDR
  • 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 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
Fwpkclnt.sys6.2.9200.16548271,08002-Mar-201309:21x86
Tcpip.sys6.2.9200.167061,799,51203-Sep-201323:26x86
Fwpkclnt.sys6.2.9200.16384271,08826-Jul-201203:30x86
Tcpip.sys6.2.9200.208141,816,92004-Sep-201304:30x86
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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
Fwpkclnt.sys6.2.9200.16547411,88002-Mar-201309:59x64
Tcpip.sys6.2.9200.167062,232,66404-Sep-201305:57x64
Fwpkclnt.sys6.2.9200.16384411,88826-Jul-201204:43x64
Tcpip.sys6.2.9200.208142,227,54404-Sep-201305:25x64
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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 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 7 and for Windows Server 2008 R2

Additional files for all supported x86-based versions of Windows 7
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File propertyValue
File nameX86_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.17939_none_58923ff3139b4b9b.manifest
File versionNot applicable
File size2,540
Date (UTC)22-Aug-2012
Time (UTC)17:35
PlatformNot applicable
File nameX86_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22441_none_5908e8562cc86755.manifest
File versionNot applicable
File size2,540
Date (UTC)04-Sep-2013
Time (UTC)02:25
PlatformNot applicable
File nameX86_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.18251_none_b4f71f35c4cb9fec.manifest
File versionNot applicable
File size3,780
Date (UTC)04-Sep-2013
Time (UTC)16:28
PlatformNot applicable
File nameX86_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.22441_none_b58b8dd2dde120ec.manifest
File versionNot applicable
File size3,834
Date (UTC)04-Sep-2013
Time (UTC)02:26
PlatformNot applicable
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Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
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File propertyValue
File nameAmd64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.17939_none_b4b0db76cbf8bcd1.manifest
File versionNot applicable
File size2,542
Date (UTC)22-Aug-2012
Time (UTC)18:33
File nameAmd64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22441_none_b52783d9e525d88b.manifest
File versionNot applicable
File size2,542
Date (UTC)04-Sep-2013
Time (UTC)02:53
File nameAmd64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.18251_none_1115bab97d291122.manifest
File versionNot applicable
File size3,784
Date (UTC)04-Sep-2013
Time (UTC)16:31
File nameAmd64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.22441_none_11aa2956963e9222.manifest
File versionNot applicable
File size3,838
Date (UTC)04-Sep-2013
Time (UTC)02:56
File nameWow64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.17939_none_bf0585c900597ecc.manifest
File versionNot applicable
File size1,166
Date (UTC)22-Aug-2012
Time (UTC)17:23
File nameWow64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22441_none_bf7c2e2c19869a86.manifest
File versionNot applicable
File size1,166
Date (UTC)04-Sep-2013
Time (UTC)02:11
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Additional files for all supported IA-64-based versions of Windows Server 2008 R2
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File propertyValue
File nameIa64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.17939_none_5893e3e913995497.manifest
File versionNot applicable
File size2,541
Date (UTC)22-Aug-2012
Time (UTC)18:25
File nameIa64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22441_none_590a8c4c2cc67051.manifest
File versionNot applicable
File size2,541
Date (UTC)04-Sep-2013
Time (UTC)02:19
File nameIa64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.18251_none_b4f8c32bc4c9a8e8.manifest
File versionNot applicable
File size3,782
Date (UTC)04-Sep-2013
Time (UTC)16:25
File nameIa64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.22441_none_b58d31c8dddf29e8.manifest
File versionNot applicable
File size3,836
Date (UTC)04-Sep-2013
Time (UTC)02:21
File nameWow64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.17939_none_bf0585c900597ecc.manifest
File versionNot applicable
File size1,166
Date (UTC)22-Aug-2012
Time (UTC)17:23
File nameWow64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22441_none_bf7c2e2c19869a86.manifest
File versionNot applicable
File size1,166
Date (UTC)04-Sep-2013
Time (UTC)02:11
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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 propertyValue
File nameX86_77a748671517b07a912373277a98f57b_31bf3856ad364e35_6.2.9200.16706_none_6dd783ff5b4a3e84.manifest
File versionNot applicable
File size702
Date (UTC)04-Sep-2013
Time (UTC)12:43
PlatformNot applicable
File nameX86_f4c77471de1262590c87e3dcdf3e9082_31bf3856ad364e35_6.2.9200.20814_none_a7806ae3909bccc6.manifest
File versionNot applicable
File size702
Date (UTC)04-Sep-2013
Time (UTC)12:43
PlatformNot applicable
File nameX86_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.2.9200.16706_none_b021a5bf378a4d79.manifest
File versionNot applicable
File size3,883
Date (UTC)04-Sep-2013
Time (UTC)12:43
PlatformNot applicable
File nameX86_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.2.9200.20814_none_b09e720a50b1d686.manifest
File versionNot applicable
File size3,883
Date (UTC)04-Sep-2013
Time (UTC)12:43
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 propertyValue
File nameAmd64_42d2df88d606b99f3c28690a7b8f8858_31bf3856ad364e35_6.2.9200.20814_none_16e1344c9fa9d40b.manifest
File versionNot applicable
File size706
Date (UTC)04-Sep-2013
Time (UTC)12:44
PlatformNot applicable
File nameAmd64_f007c5f43e16c4a6120328c96a880db6_31bf3856ad364e35_6.2.9200.16706_none_8307c4823ab3c03f.manifest
File versionNot applicable
File size706
Date (UTC)04-Sep-2013
Time (UTC)12:44
PlatformNot applicable
File nameAmd64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.2.9200.16706_none_0c404142efe7beaf.manifest
File versionNot applicable
File size3,887
Date (UTC)04-Sep-2013
Time (UTC)12:44
PlatformNot applicable
File nameAmd64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.2.9200.20814_none_0cbd0d8e090f47bc.manifest
File versionNot applicable
File size3,887
Date (UTC)04-Sep-2013
Time (UTC)12:44
PlatformNot applicable
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Properties

Article ID: 2885976 - Last Review: October 21, 2013 - Revision: 2.0
Applies to
  • Windows 8
  • Windows 8 Enterprise
  • Windows 8 Pro
  • Windows Server 2012 Datacenter
  • Windows Server 2012 Essentials
  • Windows Server 2012 Foundation
  • Windows Server 2012 Standard
  • Windows 7 Service Pack 1, when used with:
    • Windows 7 Enterprise
    • Windows 7 Home Basic
    • Windows 7 Home Premium
    • Windows 7 Professional
    • Windows 7 Starter
    • Windows 7 Ultimate
  • Windows Server 2008 R2 Service Pack 1, when used with:
    • Windows Server 2008 R2 Enterprise
    • Windows Server 2008 R2 Datacenter
    • Windows Server 2008 R2 for Itanium-Based Systems
    • Windows Server 2008 R2 Foundation
    • Windows Server 2008 R2 Standard
    • Windows Web Server 2008 R2
Keywords: 
kbAutoHotfix kbqfe kbhotfixserver kbfix kbsurveynew kbexpertiseadvanced KB2885976

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