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Article ID: 968991 - Last Review: October 7, 2011 - Revision: 2.0

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SYMPTOMS

Consider the following scenario:
  • You have a computer that is running Windows Vista or Windows Server 2008.
  • Intel I/O Acceleration Technology (I/OAT) is enabled on the computer.
  • You copy files to this computer from another computer that is running a down-level operating system, such as Windows XP and Windows Server 2003.
In this scenario, the file copying is significantly slower than when Intel I/O Acceleration Technology is disabled.

RESOLUTION

Hotfix information

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.

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 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.

Prerequisites

No prerequisites are required for Windows Server 2008-based computers.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The Global version of this hotfix has the file attributes (or later file attributes) that are listed in the following table.

Windows Vista and Windows Server 2008 file information notes

  • 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.
    Collapse this tableExpand this table
    VersionProductSR_LevelService branch
    6.0.6000.16xxxWindows VistaRTMGDR
    6.0.6000.20xxxWindows VistaRTMLDR
    6.0.6001.18xxxWindows Vista and Windows Server 2008SP1GDR
    6.0.6001.22xxxWindows Vista and Windows Server 2008SP1LDR
    6.0.6002.18xxxWindows Vista and Windows Server 2008SP2GDR
    6.0.6002.22xxxWindows Vista and Windows Server 2008SP2LDR
  • Service Pack 1 is integrated into the original release of Windows Server 2008.
  • The MANIFEST files (.manifest) and MUM files (.mum) installed for each environment are listed separately. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component. The security catalog files (attributes not listed) are signed with a Microsoft digital signature.
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.
For all supported x86-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Netio.sys6.0.6001.22447220,24810-Jun-200912:27x86
Bfe.dll6.0.6001.22447328,70410-Jun-200911:53x86
Fwpkclnt.sys6.0.6001.2244798,39210-Jun-200912:27x86
Fwpuclnt.dll6.0.6001.22447595,45610-Jun-200911:54x86
Ikeext.dll6.0.6001.22447438,27210-Jun-200911:54x86
Wfp.mofNot Applicable81401-Apr-200919:02Not Applicable
Wfp.tmfNot Applicable208,96610-Jun-200910:01Not Applicable
Tcpip.sys6.0.6001.22447890,45610-Jun-200912:28x86
Tcpip.sys6.0.6002.22150896,56810-Jun-200912:13x86
For all supported x64-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Netio.sys6.0.6001.22447342,60010-Jun-200912:43x64
Bfe.dll6.0.6001.22447458,24010-Jun-200912:09x64
Fwpkclnt.sys6.0.6001.22447165,44810-Jun-200912:43x64
Fwpuclnt.dll6.0.6001.22447779,77610-Jun-200912:10x64
Ikeext.dll6.0.6001.22447454,65610-Jun-200912:10x64
Wfp.mofNot Applicable81401-Apr-200916:13Not Applicable
Wfp.tmfNot Applicable207,86310-Jun-200910:29Not Applicable
Tcpip.sys6.0.6001.224471,408,60010-Jun-200912:44x64
Tcpip.sys6.0.6002.221501,423,43210-Jun-200912:24x64
Fwpuclnt.dll6.0.6001.22447595,45610-Jun-200911:54x86
Wfp.mofNot Applicable81401-Apr-200919:02Not Applicable
For all supported Itanium-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Netio.sys6.0.6001.22447638,53610-Jun-200912:19IA-64
Bfe.dll6.0.6001.22447781,31210-Jun-200911:40IA-64
Fwpkclnt.sys6.0.6001.22447261,19210-Jun-200912:19IA-64
Fwpuclnt.dll6.0.6001.224471,122,30410-Jun-200911:41IA-64
Ikeext.dll6.0.6001.22447925,18410-Jun-200911:41IA-64
Wfp.mofNot Applicable81401-Apr-200916:14Not Applicable
Wfp.tmfNot Applicable207,76910-Jun-200910:10Not Applicable
Tcpip.sys6.0.6001.224472,919,49610-Jun-200912:20IA-64
Tcpip.sys6.0.6002.221502,932,28010-Jun-200912:14IA-64
Fwpuclnt.dll6.0.6001.22447595,45610-Jun-200911:54x86
Wfp.mofNot Applicable81401-Apr-200919:02Not Applicable

STATUS

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

MORE INFORMATION

Intel I/OAT, together with the network direct memory access (NetDMA) feature in Windows Vista Service Pack 1 or Windows Server 2008, provides direct memory access to memory by network-intensive applications. This significantly reduces the CPU load by reducing memory copying during networking operations. For Intel I/OAT to work, it must be enabled in both the BIOS and the operating system. By default, Intel I/OAT is disabled.

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/LN/ ) Description of the standard terminology that is used to describe Microsoft software updates

Additional file information for Windows Server 2008

Additional files for all supported x86-based versions of Windows Server 2008

Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Package_for_kb968991_client_1~31bf3856ad364e35~x86~~6.0.1.0.mumNot Applicable1,64111-Jun-200906:08Not Applicable
Package_for_kb968991_client_2~31bf3856ad364e35~x86~~6.0.1.0.mumNot Applicable1,69411-Jun-200906:08Not Applicable
Package_for_kb968991_client~31bf3856ad364e35~x86~~6.0.1.0.mumNot Applicable1,71311-Jun-200906:08Not Applicable
Package_for_kb968991_sc_0~31bf3856ad364e35~x86~~6.0.1.0.mumNot Applicable1,42211-Jun-200906:08Not Applicable
Package_for_kb968991_sc_1~31bf3856ad364e35~x86~~6.0.1.0.mumNot Applicable1,69011-Jun-200906:08Not Applicable
Package_for_kb968991_sc~31bf3856ad364e35~x86~~6.0.1.0.mumNot Applicable1,70111-Jun-200906:08Not Applicable
Package_for_kb968991_server_0~31bf3856ad364e35~x86~~6.0.1.0.mumNot Applicable1,42511-Jun-200906:08Not Applicable
Package_for_kb968991_server_1~31bf3856ad364e35~x86~~6.0.1.0.mumNot Applicable1,69411-Jun-200906:08Not Applicable
Package_for_kb968991_server~31bf3856ad364e35~x86~~6.0.1.0.mumNot Applicable1,71311-Jun-200906:08Not Applicable
Package_for_kb968991_winpesrv_0~31bf3856ad364e35~x86~~6.0.1.0.mumNot Applicable1,42211-Jun-200906:08Not Applicable
Package_for_kb968991_winpesrv~31bf3856ad364e35~x86~~6.0.1.0.mumNot Applicable1,43011-Jun-200906:08Not Applicable
X86_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.0.6001.22447_none_5700d1a8ce853fc3.manifestNot Applicable3,90810-Jun-200915:45Not Applicable
X86_microsoft-windows-network-security_31bf3856ad364e35_6.0.6001.22447_none_cd89d4bc43c2906d.manifestNot Applicable127,63410-Jun-200915:46Not Applicable
X86_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.0.6001.22447_none_b38377257f9df95a.manifestNot Applicable6,25410-Jun-200915:47Not Applicable
X86_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.0.6002.22150_none_b558171b7cd2b90e.manifestNot Applicable6,40010-Jun-200913:32Not Applicable

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

Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Amd64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.0.6001.22447_none_b31f6d2c86e2b0f9.manifestNot Applicable3,91610-Jun-200914:08Not Applicable
Amd64_microsoft-windows-network-security_31bf3856ad364e35_6.0.6001.22447_none_29a8703ffc2001a3.manifestNot Applicable127,68010-Jun-200914:10Not Applicable
Amd64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.0.6001.22447_none_0fa212a937fb6a90.manifestNot Applicable6,27610-Jun-200914:11Not Applicable
Amd64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.0.6002.22150_none_1176b29f35302a44.manifestNot Applicable6,42210-Jun-200914:01Not Applicable
Package_for_kb968991_client_1~31bf3856ad364e35~amd64~~6.0.1.0.mumNot Applicable1,65111-Jun-200906:10Not Applicable
Package_for_kb968991_client_2~31bf3856ad364e35~amd64~~6.0.1.0.mumNot Applicable1,70611-Jun-200906:10Not Applicable
Package_for_kb968991_client~31bf3856ad364e35~amd64~~6.0.1.0.mumNot Applicable1,72311-Jun-200906:10Not Applicable
Package_for_kb968991_sc_0~31bf3856ad364e35~amd64~~6.0.1.0.mumNot Applicable1,43011-Jun-200906:10Not Applicable
Package_for_kb968991_sc_1~31bf3856ad364e35~amd64~~6.0.1.0.mumNot Applicable1,70211-Jun-200906:10Not Applicable
Package_for_kb968991_sc~31bf3856ad364e35~amd64~~6.0.1.0.mumNot Applicable1,71111-Jun-200906:10Not Applicable
Package_for_kb968991_server_0~31bf3856ad364e35~amd64~~6.0.1.0.mumNot Applicable1,43311-Jun-200906:10Not Applicable
Package_for_kb968991_server_1~31bf3856ad364e35~amd64~~6.0.1.0.mumNot Applicable1,70611-Jun-200906:10Not Applicable
Package_for_kb968991_server~31bf3856ad364e35~amd64~~6.0.1.0.mumNot Applicable1,72311-Jun-200906:10Not Applicable
Package_for_kb968991_winpesrv_0~31bf3856ad364e35~amd64~~6.0.1.0.mumNot Applicable1,43011-Jun-200906:10Not Applicable
Package_for_kb968991_winpesrv~31bf3856ad364e35~amd64~~6.0.1.0.mumNot Applicable1,43811-Jun-200906:10Not Applicable
Wow64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.0.6001.22447_none_bd74177ebb4372f4.manifestNot Applicable2,73010-Jun-200915:39Not Applicable
Wow64_microsoft-windows-network-security_31bf3856ad364e35_6.0.6001.22447_none_33fd1a923080c39e.manifestNot Applicable71,15510-Jun-200915:39Not Applicable

Additional files for all supported Itanium-based versions of Windows Server 2008

Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Ia64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.0.6001.22447_none_5702759ece8348bf.manifestNot Applicable3,91210-Jun-200915:33Not Applicable
Ia64_microsoft-windows-network-security_31bf3856ad364e35_6.0.6001.22447_none_cd8b78b243c09969.manifestNot Applicable127,65710-Jun-200915:35Not Applicable
Ia64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.0.6001.22447_none_b3851b1b7f9c0256.manifestNot Applicable6,26510-Jun-200915:36Not Applicable
Ia64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.0.6002.22150_none_b559bb117cd0c20a.manifestNot Applicable6,41110-Jun-200912:59Not Applicable
Package_for_kb968991_sc_0~31bf3856ad364e35~ia64~~6.0.1.0.mumNot Applicable1,42511-Jun-200906:07Not Applicable
Package_for_kb968991_sc_1~31bf3856ad364e35~ia64~~6.0.1.0.mumNot Applicable1,53011-Jun-200906:07Not Applicable
Package_for_kb968991_sc~31bf3856ad364e35~ia64~~6.0.1.0.mumNot Applicable1,70611-Jun-200906:07Not Applicable
Package_for_kb968991_server_0~31bf3856ad364e35~ia64~~6.0.1.0.mumNot Applicable1,42911-Jun-200906:07Not Applicable
Package_for_kb968991_server_1~31bf3856ad364e35~ia64~~6.0.1.0.mumNot Applicable1,53311-Jun-200906:07Not Applicable
Package_for_kb968991_server~31bf3856ad364e35~ia64~~6.0.1.0.mumNot Applicable1,71811-Jun-200906:07Not Applicable
Package_for_kb968991_winpesrv_0~31bf3856ad364e35~ia64~~6.0.1.0.mumNot Applicable1,42611-Jun-200906:07Not Applicable
Package_for_kb968991_winpesrv~31bf3856ad364e35~ia64~~6.0.1.0.mumNot Applicable1,43411-Jun-200906:07Not Applicable
Wow64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.0.6001.22447_none_bd74177ebb4372f4.manifestNot Applicable2,73010-Jun-200915:39Not Applicable
Wow64_microsoft-windows-network-security_31bf3856ad364e35_6.0.6001.22447_none_33fd1a923080c39e.manifestNot Applicable71,15510-Jun-200915:39Not Applicable
The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

APPLIES TO
  • Windows Server 2008 Standard
  • Windows Server 2008 Enterprise
  • Windows Server 2008 Datacenter
  • 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 Web Server 2008
  • Windows Vista Starter
  • Windows Vista Ultimate
  • Windows Vista Home Premium
  • Windows Vista Home Basic
  • Windows Vista Enterprise
  • Windows Vista Business
  • Windows Vista Business 64-bit Edition
  • Windows Vista Ultimate 64-bit Edition
  • Windows Vista Home Premium 64-bit Edition
  • Windows Vista Home Basic 64-bit Edition
  • Windows Vista Enterprise 64-bit Edition
Keywords: 
kbautohotfix kbexpertiseinter kbsurveynew kbbug kbfix kbqfe KB968991
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