TCP/IP packets that are received out of sequence are discarded in Windows 7 or in Windows Server 2008 R2

Symptoms

Assume that you install Windows 7 or Windows Server 2008 R2 Standard Edition on a computer that has more than 32 gigabytes (GB) of RAM. When the computer tries to communicate with another computer by using the TCP/IP protocol, all the TCP/IP packets that are received out of sequence are discarded. Additionally, the fragmented packets cannot be reassembled.

Note This issue causes retransmission overhead. Additionally, all network-related activity is affected. For example, when you try to perform a file transfer or perform a remote access session on the computer, network performance is affected by the retransmission overhead.

Cause

This issue occurs because the TCP reassembly queue quota computation does not handle the overflow of ulong data correctly.

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 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=supportNote 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 7

  • Windows 7 Service Pack 1 (SP1)

  • Windows Server 2008 R2

  • Windows Server 2008 R2 Service Pack 1 (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:

976932Information 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

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:

    Version

    Product

    Milestone

    Service branch

    6.1.760
    0.16xxx

    Windows 7 and Windows Server 2008 R2

    RTM

    GDR

    6.1.760
    0.21xxx

    Windows 7 and Windows Server 2008 R2

    RTM

    LDR

    6.1.760
    1.17xxx

    Windows 7 and Windows Server 2008 R2

    SP1

    GDR

    6.1.760
    1.22xxx

    Windows 7 and Windows Server 2008 R2

    SP1

    LDR

  • 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


File name

File version

File size

Date

Time

Platform

Netio.sys

6.1.7601.17923

240,496

07-Aug-2012

17:14

x86

Netio.sys

6.1.7601.22080

240,480

07-Aug-2012

17:10

x86

Fwpkclnt.sys

6.1.7600.16385

187,472

14-Jul-2009

01:20

x86

Tcpip.sys

6.1.7600.17092

1,287,024

07-Aug-2012

17:22

x86

Fwpkclnt.sys

6.1.7600.21294

187,248

07-Aug-2012

19:04

x86

Tcpip.sys

6.1.7600.21294

1,303,920

07-Aug-2012

19:05

x86

Fwpkclnt.sys

6.1.7601.17923

187,760

07-Aug-2012

17:13

x86

Tcpip.sys

6.1.7601.17923

1,292,128

07-Aug-2012

17:14

x86

Fwpkclnt.sys

6.1.7601.22080

187,760

07-Aug-2012

17:10

x86

Tcpip.sys

6.1.7601.22080

1,306,992

07-Aug-2012

17:10

x86

For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2


File name

File version

File size

Date

Time

Platform

Netio.sys

6.1.7601.17923

376,688

07-Aug-2012

18:16

x64

Netio.sys

6.1.7601.22080

376,672

07-Aug-2012

18:06

x64

Fwpkclnt.sys

6.1.7600.16385

288,336

14-Jul-2009

01:47

x64

Tcpip.sys

6.1.7600.17092

1,895,264

07-Aug-2012

18:07

x64

Fwpkclnt.sys

6.1.7600.21294

288,112

07-Aug-2012

18:04

x64

Tcpip.sys

6.1.7600.21294

1,877,856

07-Aug-2012

18:04

x64

Fwpkclnt.sys

6.1.7601.17923

288,624

07-Aug-2012

18:16

x64

Tcpip.sys

6.1.7601.17923

1,913,184

07-Aug-2012

18:17

x64

Fwpkclnt.sys

6.1.7601.22080

288,624

07-Aug-2012

18:06

x64

Tcpip.sys

6.1.7601.22080

1,901,936

07-Aug-2012

18:06

x64

For all supported IA-64-based versions of Windows Server 2008 R2


File name

File version

File size

Date

Time

Platform

Netio.sys

6.1.7601.17923

711,008

07-Aug-2012

16:47

IA-64

Netio.sys

6.1.7601.22080

711,008

07-Aug-2012

16:51

IA-64

Fwpkclnt.sys

6.1.7600.16385

482,896

14-Jul-2009

01:58

IA-64

Tcpip.sys

6.1.7600.17092

3,787,616

07-Aug-2012

16:51

IA-64

Fwpkclnt.sys

6.1.7600.21294

482,656

07-Aug-2012

16:46

IA-64

Tcpip.sys

6.1.7600.21294

3,807,072

07-Aug-2012

16:46

IA-64

Fwpkclnt.sys

6.1.7601.17923

483,184

07-Aug-2012

16:47

IA-64

Tcpip.sys

6.1.7601.17923

3,791,712

07-Aug-2012

16:48

IA-64

Fwpkclnt.sys

6.1.7601.22080

483,184

07-Aug-2012

16:51

IA-64

Tcpip.sys

6.1.7601.22080

3,816,304

07-Aug-2012

16:51

IA-64


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:

824684Description of the standard terminology that is used to describe Microsoft software updates

Additional file information

Additional file information for Windows 7 and for Windows Server 2008 R2

Additional files for all supported x86-based versions of Windows 7


File name

X86_24fc93aad1d40f6462f8f12171ac9c7c_31bf3856ad364e35_6.1.7601.22080_none_0be6bde70b30dfca.manifest

File version

Not applicable

File size

1,054

Date (UTC)

08-Aug-2012

Time (UTC)

13:01

Platform

Not applicable

File name

X86_5a970e4e83ed26ca91ec6264389fe3d3_31bf3856ad364e35_6.1.7601.17923_none_b2585f4fde7655f7.manifest

File version

Not applicable

File size

1,054

Date (UTC)

08-Aug-2012

Time (UTC)

13:01

Platform

Not applicable

File name

X86_9f4fd57e8f00fd2a2f255681e8d4b611_31bf3856ad364e35_6.1.7600.17092_none_a8d3de2ec4761d0f.manifest

File version

Not applicable

File size

702

Date (UTC)

08-Aug-2012

Time (UTC)

13:01

Platform

Not applicable

File name

X86_ecc5ed9ed9b3be96b44543c7d02c2574_31bf3856ad364e35_6.1.7600.21294_none_48a3bc1fb1768a13.manifest

File version

Not applicable

File size

702

Date (UTC)

08-Aug-2012

Time (UTC)

13:01

Platform

Not applicable

File name

X86_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.17923_none_58970e23139897a0.manifest

File version

Not applicable

File size

2,540

Date (UTC)

07-Aug-2012

Time (UTC)

17:36

Platform

Not applicable

File name

X86_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22080_none_58dca0c42ce9c926.manifest

File version

Not applicable

File size

2,540

Date (UTC)

07-Aug-2012

Time (UTC)

17:31

Platform

Not applicable

File name

X86_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7600.17092_none_b2e67b31c7c4c87f.manifest

File version

Not applicable

File size

3,780

Date (UTC)

08-Aug-2012

Time (UTC)

13:05

Platform

Not applicable

File name

X86_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7600.21294_none_b3721a76e0e0981e.manifest

File version

Not applicable

File size

3,834

Date (UTC)

07-Aug-2012

Time (UTC)

19:24

Platform

Not applicable

File name

X86_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.17923_none_b519b39fc4b15137.manifest

File version

Not applicable

File size

3,834

Date (UTC)

07-Aug-2012

Time (UTC)

17:40

Platform

Not applicable

File name

X86_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.22080_none_b55f4640de0282bd.manifest

File version

Not applicable

File size

3,834

Date (UTC)

07-Aug-2012

Time (UTC)

17:36

Platform

Not applicable

Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2


File name

Amd64_33efc609c771298a0df5c3ecd80bfb03_31bf3856ad364e35_6.1.7601.22080_none_9a093e14e2ae0701.manifest

File version

Not applicable

File size

1,060

Date (UTC)

08-Aug-2012

Time (UTC)

13:01

Platform

Not applicable

File name

Amd64_355cac9a625161c2e688e3180684e486_31bf3856ad364e35_6.1.7601.22080_none_02d6a726cd289a13.manifest

File version

Not applicable

File size

712

Date (UTC)

08-Aug-2012

Time (UTC)

13:01

Platform

Not applicable

File name

Amd64_4651d4e94ce0707db5d381da9ae29e22_31bf3856ad364e35_6.1.7601.17923_none_50450e65a8982f4f.manifest

File version

Not applicable

File size

712

Date (UTC)

08-Aug-2012

Time (UTC)

13:01

Platform

Not applicable

File name

Amd64_52150af570ea29f6482491a84cfb1f0d_31bf3856ad364e35_6.1.7601.22080_none_dc8af485bf552568.manifest

File version

Not applicable

File size

1,414

Date (UTC)

08-Aug-2012

Time (UTC)

13:01

Platform

Not applicable

File name

Amd64_739ebca1043e28ef158bbb830cca5f16_31bf3856ad364e35_6.1.7601.17923_none_058a7075e2141e36.manifest

File version

Not applicable

File size

1,060

Date (UTC)

08-Aug-2012

Time (UTC)

13:01

Platform

Not applicable

File name

Amd64_9ac7de29322600e79a01460282f0f7a7_31bf3856ad364e35_6.1.7601.17923_none_eb7f84bf4d1a46eb.manifest

File version

Not applicable

File size

1,414

Date (UTC)

08-Aug-2012

Time (UTC)

13:01

Platform

Not applicable

File name

Amd64_b978dce898efe5a57520304c424c7a7f_31bf3856ad364e35_6.1.7600.17092_none_5484f49623eeda54.manifest

File version

Not applicable

File size

706

Date (UTC)

08-Aug-2012

Time (UTC)

13:01

Platform

Not applicable

File name

Amd64_dd911fb6cad4c94ee2aa52a49fb13c1f_31bf3856ad364e35_6.1.7600.21294_none_05468f96c5c58557.manifest

File version

Not applicable

File size

706

Date (UTC)

08-Aug-2012

Time (UTC)

13:01

Platform

Not applicable

File name

Amd64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.17923_none_b4b5a9a6cbf608d6.manifest

File version

Not applicable

File size

2,542

Date (UTC)

07-Aug-2012

Time (UTC)

18:40

Platform

Not applicable

File name

Amd64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22080_none_b4fb3c47e5473a5c.manifest

File version

Not applicable

File size

2,542

Date (UTC)

07-Aug-2012

Time (UTC)

18:30

Platform

Not applicable

File name

Amd64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7600.17092_none_0f0516b5802239b5.manifest

File version

Not applicable

File size

3,784

Date (UTC)

08-Aug-2012

Time (UTC)

13:08

Platform

Not applicable

File name

Amd64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7600.21294_none_0f90b5fa993e0954.manifest

File version

Not applicable

File size

3,838

Date (UTC)

07-Aug-2012

Time (UTC)

20:20

Platform

Not applicable

File name

Amd64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.17923_none_11384f237d0ec26d.manifest

File version

Not applicable

File size

3,838

Date (UTC)

07-Aug-2012

Time (UTC)

18:44

Platform

Not applicable

File name

Amd64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.22080_none_117de1c4965ff3f3.manifest

File version

Not applicable

File size

3,838

Date (UTC)

07-Aug-2012

Time (UTC)

18:34

Platform

Not applicable

File name

Wow64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.17923_none_bf0a53f90056cad1.manifest

File version

Not applicable

File size

1,166

Date (UTC)

07-Aug-2012

Time (UTC)

17:22

Platform

Not applicable

File name

Wow64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22080_none_bf4fe69a19a7fc57.manifest

File version

Not applicable

File size

1,166

Date (UTC)

07-Aug-2012

Time (UTC)

17:19

Platform

Not applicable

Additional files for all supported IA-64-based versions of Windows Server 2008 R2


File name

Ia64_542d701f5d4498750813332622c44a07_31bf3856ad364e35_6.1.7601.17923_none_22fb290c7443b438.manifest

File version

Not applicable

File size

1,411

Date (UTC)

08-Aug-2012

Time (UTC)

13:01

Platform

Not applicable

File name

Ia64_5a4db9694c9341a2e3b96364160b0503_31bf3856ad364e35_6.1.7600.17092_none_5254df73f4c736b2.manifest

File version

Not applicable

File size

704

Date (UTC)

08-Aug-2012

Time (UTC)

13:01

Platform

Not applicable

File name

Ia64_ad03d321ede12fe0425ea8b1d55d466d_31bf3856ad364e35_6.1.7600.21294_none_fc15be90ede0de4b.manifest

File version

Not applicable

File size

704

Date (UTC)

08-Aug-2012

Time (UTC)

13:01

Platform

Not applicable

File name

Ia64_f54adc8037d1732e8e5a600f1707a2e9_31bf3856ad364e35_6.1.7601.22080_none_52e7b2f0830732f6.manifest

File version

Not applicable

File size

1,411

Date (UTC)

08-Aug-2012

Time (UTC)

13:01

Platform

Not applicable

File name

Ia64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.17923_none_5898b2191396a09c.manifest

File version

Not applicable

File size

2,541

Date (UTC)

07-Aug-2012

Time (UTC)

18:26

Platform

Not applicable

File name

Ia64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22080_none_58de44ba2ce7d222.manifest

File version

Not applicable

File size

2,541

Date (UTC)

07-Aug-2012

Time (UTC)

18:28

Platform

Not applicable

File name

Ia64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7600.17092_none_b2e81f27c7c2d17b.manifest

File version

Not applicable

File size

3,782

Date (UTC)

08-Aug-2012

Time (UTC)

13:01

Platform

Not applicable

File name

Ia64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7600.21294_none_b373be6ce0dea11a.manifest

File version

Not applicable

File size

3,836

Date (UTC)

07-Aug-2012

Time (UTC)

20:10

Platform

Not applicable

File name

Ia64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.17923_none_b51b5795c4af5a33.manifest

File version

Not applicable

File size

3,836

Date (UTC)

07-Aug-2012

Time (UTC)

18:31

Platform

Not applicable

File name

Ia64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.22080_none_b560ea36de008bb9.manifest

File version

Not applicable

File size

3,836

Date (UTC)

07-Aug-2012

Time (UTC)

18:32

Platform

Not applicable

File name

Wow64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.17923_none_bf0a53f90056cad1.manifest

File version

Not applicable

File size

1,166

Date (UTC)

07-Aug-2012

Time (UTC)

17:22

Platform

Not applicable

File name

Wow64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22080_none_bf4fe69a19a7fc57.manifest

File version

Not applicable

File size

1,166

Date (UTC)

07-Aug-2012

Time (UTC)

17:19

Platform

Not applicable

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