The transfer speed is very slow when you use the BITS to transfer files on a high latency link on computers that are running Windows Server 2003 or Windows XP Professional x64 Edition

Support for Windows XP has ended

Microsoft ended support for Windows XP on April 8, 2014. This change has affected your software updates and security options. Learn what this means for you and how to stay protected.

Support for Windows Server 2003 ended on July 14, 2015

Microsoft ended support for Windows Server 2003 on July 14, 2015. This change has affected your software updates and security options. Learn what this means for you and how to stay protected.

This article has been archived. It is offered "as is" and will no longer be updated.
Symptoms
On computers that are running Windows Server 2003 or Windows XP Professional x64 Edition, you use the Background Intelligent Transfer Service (BITS) to transfer files. If these files are transferred on a high latency link, the transfer speed is very slow. For example, it takes 3 minutes to upload a 900 kilobyte (KB) file without using BITS. However, it takes 20 minutes to upload the same file by using BITS.

Note One example of high latency links is satellite links.
Cause
When BITS calculates the latency for a transfer on a high latency link, BITS selects a high interval. This high interval causes the transfer speed to be very slow.
Resolution

Hotfix information

Windows Server 2003

A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that is described in this article. Apply it only to systems that are experiencing this specific problem. This hotfix may 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.

To resolve this problem immediately, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
Prerequisites
To apply this hotfix, you must be running Windows Server 2003 Service Pack 2 on the computer.
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 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 Server 2003 with Service Pack 2, x86-based versions
File nameFile versionFile sizeDateTimePlatformSP requirement
Bitsprx2.dll6.7.3790.44228,19205-Dec-200816:15x86SP2
Bitsprx3.dll6.7.3790.44227,16805-Dec-200816:15x86SP2
Bitsprx4.dll6.7.3790.44227,16805-Dec-200816:15x86SP2
Qmgr.dll6.7.3790.4422406,52805-Dec-200816:15x86SP2
Qmgrprxy.dll6.7.3790.442219,45605-Dec-200816:15x86SP2

Windows Server 2003 with Service Pack 2 x64-based versions
File nameFile versionFile sizeDateTimePlatformSP requirementService branch
Bitsprx2.dll6.7.3790.442210,24005-Dec-200815:57x64SP2Not applicable
Bitsprx3.dll6.7.3790.44229,72805-Dec-200815:57x64SP2Not applicable
Bitsprx4.dll6.7.3790.44228,70405-Dec-200815:57x64SP2Not applicable
Qmgr.dll6.7.3790.4422760,32005-Dec-200815:57x64SP2Not applicable
Qmgrprxy.dll6.7.3790.442224,57605-Dec-200815:57x64SP2Not applicable
Wbitsprx2.dll6.7.3790.44228,19205-Dec-200815:57x86SP2WOW
Wbitsprx3.dll6.7.3790.44227,16805-Dec-200815:57x86SP2WOW
Wbitsprx4.dll6.7.3790.44227,16805-Dec-200815:57x86SP2WOW
Wqmgrprxy.dll6.7.3790.442219,45605-Dec-200815:57x86SP2WOW

Windows Server 2003 with Service Pack 2, Itanium-based versions
File nameFile versionFile sizeDateTimePlatformSP requirementService branch
Bitsprx2.dll6.7.3790.442216,89605-Dec-200815:56IA-64SP2Not applicable
Bitsprx3.dll6.7.3790.442214,33605-Dec-200815:56IA-64SP2Not applicable
Bitsprx4.dll6.7.3790.442213,82405-Dec-200815:56IA-64SP2Not applicable
Qmgr.dll6.7.3790.44221,353,72805-Dec-200815:56IA-64SP2Not applicable
Qmgrprxy.dll6.7.3790.442234,81605-Dec-200815:56IA-64SP2Not applicable
Wbitsprx2.dll6.7.3790.44228,19205-Dec-200815:56x86SP2WOW
Wbitsprx3.dll6.7.3790.44227,16805-Dec-200815:56x86SP2WOW
Wbitsprx4.dll6.7.3790.44227,16805-Dec-200815:56x86SP2WOW
Wqmgrprxy.dll6.7.3790.442219,45605-Dec-200815:56x86SP2WOW

Windows XP Professional x64 Edition

A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that is described in this article. Apply it only to systems that are experiencing this specific problem. This hotfix may 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.

To resolve this problem immediately, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
Prerequisites
To apply this hotfix, you must be running Windows XP Professional x64 Edition Service Pack 2 on the computer.
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 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 XP Professional x64 Edition with Service Pack 2
File nameFile versionFile sizeDateTimePlatformSP requirementService branch
Bitsprx2.dll6.7.3790.442210,24005-Dec-200815:57x64SP2Not applicable
Bitsprx3.dll6.7.3790.44229,72805-Dec-200815:57x64SP2Not applicable
Bitsprx4.dll6.7.3790.44228,70405-Dec-200815:57x64SP2Not applicable
Qmgr.dll6.7.3790.4422760,32005-Dec-200815:57x64SP2Not applicable
Qmgrprxy.dll6.7.3790.442224,57605-Dec-200815:57x64SP2Not applicable
Wbitsprx2.dll6.7.3790.44228,19205-Dec-200815:57x86SP2WOW
Wbitsprx3.dll6.7.3790.44227,16805-Dec-200815:57x86SP2WOW
Wbitsprx4.dll6.7.3790.44227,16805-Dec-200815:57x86SP2WOW
Wqmgrprxy.dll6.7.3790.442219,45605-Dec-200815:57x86SP2WOW
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
References
For more information about BITS, visit the following Microsoft Developer Network (MSDN) Web site:
Properties

Article ID: 959194 - Last Review: 01/16/2015 03:21:19 - Revision: 3.0

  • Microsoft Windows Server 2003, Web Edition
  • Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)
  • Microsoft Windows Server 2003, Datacenter Edition for Itanium-Based Systems
  • Microsoft Windows Server 2003, Datacenter x64 Edition
  • Microsoft Windows Server 2003, Enterprise x64 Edition
  • Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)
  • Microsoft Windows Server 2003, Enterprise Edition for Itanium-based Systems
  • Microsoft Windows Server 2003, Standard x64 Edition
  • Microsoft Windows Server 2003, Standard Edition (32-bit x86)
  • Microsoft Windows XP Professional x64 Edition
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