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Article ID: 955427 - Last Review: October 8, 2011 - Revision: 2.0

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SYMPTOMS

When you copy large files from one computer to another computer in a high-bandwidth network environment, the copy process is very slow if both computers are running either Windows Vista or Windows Sever 2008. Additionally, the throughput of the network is much lower than expected. In this situation, the total network bandwidth cannot be used.

CAUSE

This issue occurs because the TCP transmission does not recover immediately after a retransmit occurs.Additionally, the TCP component cannot expand the TCP receive window. This behavior causes the poor copy performance through the network.

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. 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 Web site:
http://support.microsoft.com/contactus/?ws=support (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.

Important Windows Vista and Windows Server 2008 hotfixes are included in the same packages. However, only one of these products may be listed on the “Hotfix Request” page. To request the hotfix package that applies to both Windows Vista and Windows Server 2008, just select the product that is listed on the page.

Prerequisites

To apply this hotfix, the computer must run one of the following:
  • Windows Vista Service Pack 1
  • Windows Server 2008

Restart requirement

You have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

Hotfix file information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

Windows Vista and Windows Server 2008 file information notes

The .manifest files and the .mum files that are installed in each environment are listed separately in the "Additional file information for Windows Server 2008 and for Windows Vista" section. These files and their associated .cat (security catalog) files are critical to maintaining the state of the updated component. The .cat files are signed with a Microsoft digital signature. The attributes of these security files are not listed.
For all supported x86-based versions of Windows Vista and of Windows Server 2008
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Netio.sys6.0.6001.22267223,28816-Sep-200803:51x86
Bfe.dll6.0.6001.22267328,70416-Sep-200803:36x86
Fwpkclnt.sys6.0.6001.22267101,43216-Sep-200803:51x86
Fwpuclnt.dll6.0.6001.22267595,45616-Sep-200803:36x86
Ikeext.dll6.0.6001.22267438,27216-Sep-200803:36x86
Wfp.mofNot Applicable81418-Dec-200721:11Not Applicable
Wfp.tmfNot Applicable175,50816-Sep-200801:35Not Applicable
Tcpip.sys6.0.6001.22267891,96016-Sep-200803:47x86
For all supported x64-based versions of Windows Vista and of Windows Server 2008
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Netio.sys6.0.6001.22267345,65616-Sep-200804:22x64
Bfe.dll6.0.6001.22267458,24016-Sep-200804:12x64
Fwpkclnt.sys6.0.6001.22267168,50416-Sep-200804:22x64
Fwpuclnt.dll6.0.6001.22267779,77616-Sep-200804:13x64
Ikeext.dll6.0.6001.22267454,65616-Sep-200804:13x64
Wfp.mofNot Applicable81418-Dec-200721:10Not Applicable
Wfp.tmfNot Applicable174,68016-Sep-200802:06Not Applicable
Tcpip.sys6.0.6001.222671,413,68816-Sep-200804:27x64
Fwpuclnt.dll6.0.6001.22267595,45616-Sep-200803:36x86
Wfp.mofNot Applicable81418-Dec-200721:11Not Applicable
For all supported Itanium-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Netio.sys6.0.6001.22267641,59216-Sep-200804:16IA-64
Bfe.dll6.0.6001.22267781,31216-Sep-200803:52IA-64
Fwpkclnt.sys6.0.6001.22267264,24816-Sep-200804:15IA-64
Fwpuclnt.dll6.0.6001.222671,122,30416-Sep-200803:55IA-64
Ikeext.dll6.0.6001.22267925,18416-Sep-200803:56IA-64
Wfp.mofNot Applicable81418-Dec-200721:11Not Applicable
Wfp.tmfNot Applicable174,77516-Sep-200801:57Not Applicable
Tcpip.sys6.0.6001.222672,922,55216-Sep-200804:15IA-64
Fwpuclnt.dll6.0.6001.22267595,45616-Sep-200803:36x86
Wfp.mofNot Applicable81418-Dec-200721:11Not Applicable

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  (http://support.microsoft.com/kb/824684/ ) Description of the standard terminology that is used to describe Microsoft software updates

Additional file information for Windows Vista and for Windows Server 2008

Additional files for all supported x86-based versions of Windows Vista and of Windows Server 2008
Collapse this tableExpand this table
File namePackage_1_for_kb955427~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size2,230
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_2_for_kb955427~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size2,177
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_3_for_kb955427~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,729
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_4_for_kb955427~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size2,235
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_5_for_kb955427~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size2,235
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_for_kb955427_client_1~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,641
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_for_kb955427_client~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,431
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_for_kb955427_sc_0~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,422
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_for_kb955427_sc~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,423
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_for_kb955427_server_0~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,425
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_for_kb955427_server~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,431
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_for_kb955427_winpesrv_0~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,422
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_for_kb955427_winpesrv~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,430
Date (UTC)16-Sep-2008
Time (UTC)13:57
File nameX86_031ad6b4da27ab3ed765d93b1096c72d_31bf3856ad364e35_6.0.6001.22267_none_4a9597f2ca0dc659.manifest
File versionNot Applicable
File size1,056
Date (UTC)16-Sep-2008
Time (UTC)13:57
File nameX86_0ef6c2d588c10e791e0830fe88b6f55d_31bf3856ad364e35_6.0.6001.22267_none_9a364d767823ed21.manifest
File versionNot Applicable
File size1,402
Date (UTC)16-Sep-2008
Time (UTC)13:57
File nameX86_501456064ab69486c32401c676ba8101_31bf3856ad364e35_6.0.6001.22267_none_ce6b9faf2c47a5ca.manifest
File versionNot Applicable
File size702
Date (UTC)16-Sep-2008
Time (UTC)13:57
File nameX86_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.0.6001.22267_none_56eb2e04ce957d57.manifest
File versionNot Applicable
File size3,908
Date (UTC)16-Sep-2008
Time (UTC)04:29
File nameX86_microsoft-windows-network-security_31bf3856ad364e35_6.0.6001.22267_none_cd74311843d2ce01.manifest
File versionNot Applicable
File size127,634
Date (UTC)16-Sep-2008
Time (UTC)04:31
File nameX86_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.0.6001.22267_none_b36dd3817fae36ee.manifest
File versionNot Applicable
File size6,254
Date (UTC)16-Sep-2008
Time (UTC)04:32
Additional files for all supported x64-based versions of Windows Vista and of Windows Server 2008
Collapse this tableExpand this table
File nameAmd64_61b13285998199740a34780be4d7ed0b_31bf3856ad364e35_6.0.6001.22267_none_88faacdfc8b6685f.manifest
File versionNot Applicable
File size1,410
Date (UTC)16-Sep-2008
Time (UTC)13:57
File nameAmd64_73e9d3edd041e88897247ad76672e6e7_31bf3856ad364e35_6.0.6001.22267_none_c6866510e54ed26e.manifest
File versionNot Applicable
File size2,114
Date (UTC)16-Sep-2008
Time (UTC)13:57
File nameAmd64_cc3c95b310b432dc578f01f1d5867c88_31bf3856ad364e35_6.0.6001.22267_none_4d7a5e6d94531244.manifest
File versionNot Applicable
File size706
Date (UTC)16-Sep-2008
Time (UTC)13:57
File nameAmd64_ff9c9fc17153f1c927fcaa6d905056bb_31bf3856ad364e35_6.0.6001.22267_none_ccb3729e75eafa9e.manifest
File versionNot Applicable
File size1,766
Date (UTC)16-Sep-2008
Time (UTC)13:57
File nameAmd64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.0.6001.22267_none_b309c98886f2ee8d.manifest
File versionNot Applicable
File size3,916
Date (UTC)16-Sep-2008
Time (UTC)04:50
File nameAmd64_microsoft-windows-network-security_31bf3856ad364e35_6.0.6001.22267_none_2992cc9bfc303f37.manifest
File versionNot Applicable
File size127,680
Date (UTC)16-Sep-2008
Time (UTC)04:53
File nameAmd64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.0.6001.22267_none_0f8c6f05380ba824.manifest
File versionNot Applicable
File size6,276
Date (UTC)16-Sep-2008
Time (UTC)04:54
File namePackage_1_for_kb955427~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size2,244
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_2_for_kb955427~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size2,643
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_3_for_kb955427~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,739
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_4_for_kb955427~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size2,701
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_5_for_kb955427~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size2,701
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_for_kb955427_client_1~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,651
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_for_kb955427_client~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,439
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_for_kb955427_sc_0~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,430
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_for_kb955427_sc~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,431
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_for_kb955427_server_0~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,433
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_for_kb955427_server~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,439
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_for_kb955427_winpesrv_0~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,430
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_for_kb955427_winpesrv~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,438
Date (UTC)16-Sep-2008
Time (UTC)13:57
File nameWow64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.0.6001.22267_none_bd5e73dabb53b088.manifest
File versionNot Applicable
File size2,730
Date (UTC)16-Sep-2008
Time (UTC)04:19
File nameWow64_microsoft-windows-network-security_31bf3856ad364e35_6.0.6001.22267_none_33e776ee30910132.manifest
File versionNot Applicable
File size71,155
Date (UTC)16-Sep-2008
Time (UTC)04:20
Additional files for all supported Itanium-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameIa64_15284d4353000518d2aa2cc8a5d245b0_31bf3856ad364e35_6.0.6001.22267_none_e46de7ee7936dba7.manifest
File versionNot Applicable
File size2,110
Date (UTC)16-Sep-2008
Time (UTC)13:57
File nameIa64_b5552bd703399517f4d5a82899958cf7_31bf3856ad364e35_6.0.6001.22267_none_d19d71a856e1e37e.manifest
File versionNot Applicable
File size1,406
Date (UTC)16-Sep-2008
Time (UTC)13:57
File nameIa64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.0.6001.22267_none_56ecd1face938653.manifest
File versionNot Applicable
File size3,912
Date (UTC)16-Sep-2008
Time (UTC)04:41
File nameIa64_microsoft-windows-network-security_31bf3856ad364e35_6.0.6001.22267_none_cd75d50e43d0d6fd.manifest
File versionNot Applicable
File size127,657
Date (UTC)16-Sep-2008
Time (UTC)04:43
File nameIa64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.0.6001.22267_none_b36f77777fac3fea.manifest
File versionNot Applicable
File size6,265
Date (UTC)16-Sep-2008
Time (UTC)04:44
File namePackage_1_for_kb955427~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size2,237
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_2_for_kb955427~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size2,694
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_3_for_kb955427~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size2,694
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_for_kb955427_sc_0~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,425
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_for_kb955427_sc~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,426
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_for_kb955427_server_0~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,429
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_for_kb955427_server~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,434
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_for_kb955427_winpesrv_0~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,426
Date (UTC)16-Sep-2008
Time (UTC)13:57
File namePackage_for_kb955427_winpesrv~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,433
Date (UTC)16-Sep-2008
Time (UTC)13:57
File nameWindows6.0-kb955427-ia64.cab
File versionNot Applicable
File size2,380,292
Date (UTC)15-Sep-2008
Time (UTC)23:28
File nameWow64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.0.6001.22267_none_bd5e73dabb53b088.manifest
File versionNot Applicable
File size2,730
Date (UTC)16-Sep-2008
Time (UTC)04:19
File nameWow64_microsoft-windows-network-security_31bf3856ad364e35_6.0.6001.22267_none_33e776ee30910132.manifest
File versionNot Applicable
File size71,155
Date (UTC)16-Sep-2008
Time (UTC)04:20

APPLIES TO
  • Windows Server 2008 Datacenter without Hyper-V
  • Windows Server 2008 Enterprise without Hyper-V
  • Windows Server 2008 for Itanium-Based Systems
  • Windows Server 2008 Standard without Hyper-V
  • Windows Server 2008 Datacenter
  • Windows Server 2008 Enterprise
  • Windows Server 2008 Standard
  • Windows Server Update Services with Service Pack 1
  • Windows Vista Enterprise 64-bit Edition
  • Windows Vista Home Basic 64-bit Edition
  • Windows Vista Home Premium 64-bit Edition
  • Windows Vista Ultimate 64-bit Edition
  • Windows Vista Business
  • Windows Vista Business 64-bit Edition
  • Windows Vista Enterprise
  • Windows Vista Home Basic
  • Windows Vista Home Premium
  • Windows Vista Ultimate
Keywords: 
kbautohotfix kbexpertisebeginner kbfix kbqfe KB955427
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