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Article ID: 973779 - Last Review: August 28, 2009 - Revision: 1.0

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SYMPTOMS

On a client computer that is running Windows Vista or Windows Server 2008, you apply some Quality of Services (QoS) Group Policy settings under the following subsection:
Local Computer Policy\Computer Configuration\Administrative Templates\Network\QoS Packet Scheduler
When you log on to the client computer, you see the Group Policy settings are applied correctly. However, after you restart the client computer, the Group Policy settings are no longer applied.

For example, you enable the Group Policy setting "Guaranteed service type." You specify a custom Layer-3 Differentiated Services Code Point (DSCP) value for packets with the "Guaranteed service type." After you restart the client computer, the custom Quality of Service (QoS) DSCP settings in the Group Policy are not retained. In this scenario, the default value for "Guaranteed service type" is used by the operating system after the computer is restarted.

This problem occurs whether you apply the Group Policy settings by using the local policy, or by using Group Policy objects in an Active Directory domain.

This problem also occurs on a client computer that is running Windows XP or Windows Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
972878  (http://support.microsoft.com/kb/972878/ ) The "Guaranteed service type" Group Policy setting returns to the default value after you restart a client computer that is running Windows XP or Windows Server 2003

CAUSE

This problem occurs because the pacer.sys driver tries to read the registry settings during startup,before the SOFTWARE hive is loaded:
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\windows\Psched\DiffservByteMappingConforming

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 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

To apply this hotfix on computers that are running Windows Vista, you must have Windows Vista SP1 or Windows Vista SP2 installed. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
935791  (http://support.microsoft.com/kb/935791/ ) How to obtain the latest Windows Vista service pack


No prerequisites are required for computers that are running Windows Server 2008.

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 Vista and Windows Server 2008 file information notes

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.
For all supported x86-based versions of Windows Server 2008 and Windows Vista
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Pacer.sys6.0.6001.2247574,24018-Jul-200910:01x86
Pacercnt.hNot Applicable3,01001-Apr-200919:01Not Applicable
Pacerprf.dll6.0.6001.2247515,36018-Jul-200911:55x86
Pacerprf.iniNot Applicable13,75001-Apr-200919:01Not Applicable
Traffic.dll6.0.6001.2247533,28018-Jul-200911:56x86
Wshqos.dll6.0.6001.2247513,82418-Jul-200911:56x86
Pacer.sys6.0.6002.2218074,24018-Jul-200909:44x86
Pacercnt.hNot Applicable3,01003-Apr-200921:04Not Applicable
Pacerprf.dll6.0.6002.2218015,36018-Jul-200909:44x86
Pacerprf.iniNot Applicable13,75003-Apr-200921:04Not Applicable
Traffic.dll6.0.6002.2218033,28018-Jul-200911:47x86
Wshqos.dll6.0.6002.2218013,82418-Jul-200909:44x86
For all supported x64-based versions of Windows Server 2008 and Windows Vista
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Pacer.sys6.0.6001.2247595,74418-Jul-200910:31x64
Pacercnt.hNot Applicable3,01001-Apr-200916:12Not Applicable
Pacerprf.dll6.0.6001.2247517,92018-Jul-200912:24x64
Pacerprf.iniNot Applicable13,75001-Apr-200916:12Not Applicable
Traffic.dll6.0.6001.2247539,42418-Jul-200912:25x64
Wshqos.dll6.0.6001.2247516,89618-Jul-200912:25x64
Pacer.sys6.0.6002.2218095,74418-Jul-200910:03x64
Pacercnt.hNot Applicable3,01003-Apr-200920:49Not Applicable
Pacerprf.dll6.0.6002.2218017,92018-Jul-200911:46x64
Pacerprf.iniNot Applicable13,75003-Apr-200920:49Not Applicable
Traffic.dll6.0.6002.2218039,42418-Jul-200911:46x64
Wshqos.dll6.0.6002.2218016,89618-Jul-200911:47x64
Pacerprf.dll6.0.6001.2247515,36018-Jul-200911:55x86
Traffic.dll6.0.6001.2247533,28018-Jul-200911:56x86
Wshqos.dll6.0.6001.2247513,82418-Jul-200911:56x86
Pacerprf.dll6.0.6002.2218015,36018-Jul-200909:44x86
Traffic.dll6.0.6002.2218033,28018-Jul-200911:47x86
Wshqos.dll6.0.6002.2218013,82418-Jul-200909:44x86
For all supported IA-64-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Pacer.sys6.0.6001.22475208,38418-Jul-200910:12IA-64
Pacercnt.hNot Applicable3,01001-Apr-200916:12Not Applicable
Pacerprf.dll6.0.6001.2247540,96018-Jul-200911:52IA-64
Pacerprf.iniNot Applicable13,75001-Apr-200916:12Not Applicable
Traffic.dll6.0.6001.2247598,81618-Jul-200911:53IA-64
Wshqos.dll6.0.6001.2247534,81618-Jul-200911:54IA-64
Pacer.sys6.0.6002.22180208,38418-Jul-200910:01IA-64
Pacercnt.hNot Applicable3,01003-Apr-200920:50Not Applicable
Pacerprf.dll6.0.6002.2218040,96018-Jul-200911:41IA-64
Pacerprf.iniNot Applicable13,75003-Apr-200920:50Not Applicable
Traffic.dll6.0.6002.2218098,81618-Jul-200911:43IA-64
Wshqos.dll6.0.6002.2218034,81618-Jul-200911:44IA-64
Pacerprf.dll6.0.6001.2247515,36018-Jul-200911:55x86
Traffic.dll6.0.6001.2247533,28018-Jul-200911:56x86
Wshqos.dll6.0.6001.2247513,82418-Jul-200911:56x86
Pacerprf.dll6.0.6002.2218015,36018-Jul-200909:44x86
Traffic.dll6.0.6002.2218033,28018-Jul-200911:47x86
Wshqos.dll6.0.6002.2218013,82418-Jul-200909:44x86

WORKAROUND

To work around this problem, run the command "gpupdate /target:computer /force" to manually update the Group Policy.

STATUS

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

MORE INFORMATION

The Group Policy setting mentioned in the Symptoms section is as follows:

Computer Configuration\Administrative Templates\Network\QoS Packet Scheduler\DSCP value of conforming packets\Guaranteed service type

To identify this problem, take a network monitor trace of ServiceType_Guaranteed-flagged and QoS-tagged traffic flows. Examine the packets and verify that the system is using the custom DSCP value as it is set in the Group Policy setting.

For more information about the GUARANTEED service type, visit the following Web site:
http://msdn.microsoft.com/en-us/library/aa373709(VS.85).aspx (http://msdn.microsoft.com/en-us/library/aa373709(VS.85).aspx)
For more information about the QoS tools and settings, visit the following Web site:
http://technet.microsoft.com/en-us/library/cc737728(WS.10).aspx (http://technet.microsoft.com/en-us/library/cc737728(WS.10).aspx)
For more information about the QoS service types , visit the following Web site:
http://technet.microsoft.com/en-us/library/bb870407.aspx (http://technet.microsoft.com/en-us/library/bb870407.aspx)

Additional file information for Windows Server 2008 and Windows Vista

Additional files for all supported x86-based versions of Windows Server 2008 and Windows Vista
Collapse this tableExpand this table
File namePackage_for_kb973779_client_1~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,367
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File namePackage_for_kb973779_client_2~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,693
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File namePackage_for_kb973779_client~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,713
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File namePackage_for_kb973779_sc_0~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,421
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File namePackage_for_kb973779_sc_1~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,690
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File namePackage_for_kb973779_sc~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,701
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File namePackage_for_kb973779_server_0~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,425
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File namePackage_for_kb973779_server_1~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,694
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File namePackage_for_kb973779_server~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,713
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File nameX86_25f3b00a6a3928748d97d78b2139c9bc_31bf3856ad364e35_6.0.6001.22475_none_b6f150af2582ecc2.manifest
File versionNot Applicable
File size691
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File nameX86_6c70f3d669d43d18b37a83880b91c4c7_31bf3856ad364e35_6.0.6002.22180_none_1c3d13bb96df9177.manifest
File versionNot Applicable
File size691
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File nameX86_microsoft-windows-qos_31bf3856ad364e35_6.0.6001.22475_none_ae8e5d0b70f67b6c.manifest
File versionNot Applicable
File size21,891
Date (UTC)18-Jul-2009
Time (UTC)22:25
PlatformNot Applicable
File nameX86_microsoft-windows-qos_31bf3856ad364e35_6.0.6002.22180_none_b064fd956e296dce.manifest
File versionNot Applicable
File size21,891
Date (UTC)18-Jul-2009
Time (UTC)22:01
PlatformNot Applicable
Additional files for all supported x64-based versions of Windows Server 2008 and Windows Vista
Collapse this tableExpand this table
File nameAmd64_0dcc3426abdb6ab3d2afe715cc258d0a_31bf3856ad364e35_6.0.6001.22475_none_bd7ef75f5652b12d.manifest
File versionNot Applicable
File size1,032
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File nameAmd64_38fc889fc886e0bf8822f3553b00f93d_31bf3856ad364e35_6.0.6002.22180_none_87275badd71f560d.manifest
File versionNot Applicable
File size695
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File nameAmd64_e767f3e347b9eec3a75e384d59645242_31bf3856ad364e35_6.0.6002.22180_none_6e8a91416290e63a.manifest
File versionNot Applicable
File size695
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File nameAmd64_f99c1e7a6e11680427782eb49ac4efe1_31bf3856ad364e35_6.0.6001.22475_none_2a3546f97e0f488d.manifest
File versionNot Applicable
File size695
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File nameAmd64_microsoft-windows-qos_31bf3856ad364e35_6.0.6001.22475_none_0aacf88f2953eca2.manifest
File versionNot Applicable
File size21,935
Date (UTC)18-Jul-2009
Time (UTC)22:34
PlatformNot Applicable
File nameAmd64_microsoft-windows-qos_31bf3856ad364e35_6.0.6002.22180_none_0c8399192686df04.manifest
File versionNot Applicable
File size21,935
Date (UTC)18-Jul-2009
Time (UTC)21:58
PlatformNot Applicable
File namePackage_for_kb973779_client_1~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,375
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File namePackage_for_kb973779_client_2~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,982
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File namePackage_for_kb973779_client~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,723
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File namePackage_for_kb973779_sc_0~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,429
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File namePackage_for_kb973779_sc_1~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,979
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File namePackage_for_kb973779_sc~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,711
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File namePackage_for_kb973779_server_0~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,433
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File namePackage_for_kb973779_server_1~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,983
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File namePackage_for_kb973779_server~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,723
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File nameWow64_microsoft-windows-qos_31bf3856ad364e35_6.0.6001.22475_none_1501a2e15db4ae9d.manifest
File versionNot Applicable
File size20,913
Date (UTC)18-Jul-2009
Time (UTC)22:09
PlatformNot Applicable
File nameWow64_microsoft-windows-qos_31bf3856ad364e35_6.0.6002.22180_none_16d8436b5ae7a0ff.manifest
File versionNot Applicable
File size20,913
Date (UTC)18-Jul-2009
Time (UTC)21:48
PlatformNot Applicable
Additional files for all supported IA-64-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameIa64_302c2ac24df5dfb25ad9a00a10ac34f8_31bf3856ad364e35_6.0.6001.22475_none_69e6c670aa25526c.manifest
File versionNot Applicable
File size1,030
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File nameIa64_579343d6649bf779b0354d37506744c3_31bf3856ad364e35_6.0.6001.22475_none_2af5924bce7de7d9.manifest
File versionNot Applicable
File size693
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File nameIa64_af08e45db67f201686e326ad7f7d8577_31bf3856ad364e35_6.0.6002.22180_none_ab183d7d4dc205bf.manifest
File versionNot Applicable
File size693
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File nameIa64_e767f3e347b9eec3a75e384d59645242_31bf3856ad364e35_6.0.6002.22180_none_126d99b3aa317e00.manifest
File versionNot Applicable
File size694
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File nameIa64_microsoft-windows-qos_31bf3856ad364e35_6.0.6001.22475_none_ae90010170f48468.manifest
File versionNot Applicable
File size21,912
Date (UTC)18-Jul-2009
Time (UTC)22:14
PlatformNot Applicable
File nameIa64_microsoft-windows-qos_31bf3856ad364e35_6.0.6002.22180_none_b066a18b6e2776ca.manifest
File versionNot Applicable
File size21,912
Date (UTC)18-Jul-2009
Time (UTC)21:52
PlatformNot Applicable
File namePackage_for_kb973779_sc_0~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,425
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File namePackage_for_kb973779_sc_1~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,806
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File namePackage_for_kb973779_sc~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,706
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File namePackage_for_kb973779_server_0~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,429
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File namePackage_for_kb973779_server_1~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,808
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File namePackage_for_kb973779_server~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,718
Date (UTC)19-Jul-2009
Time (UTC)05:05
PlatformNot Applicable
File nameWow64_microsoft-windows-qos_31bf3856ad364e35_6.0.6001.22475_none_1501a2e15db4ae9d.manifest
File versionNot Applicable
File size20,913
Date (UTC)18-Jul-2009
Time (UTC)22:09
PlatformNot Applicable
File nameWow64_microsoft-windows-qos_31bf3856ad364e35_6.0.6002.22180_none_16d8436b5ae7a0ff.manifest
File versionNot Applicable
File size20,913
Date (UTC)18-Jul-2009
Time (UTC)21:48
PlatformNot Applicable

APPLIES TO
  • Windows Vista Business
  • Windows Vista Enterprise
  • Windows Vista Ultimate
  • Windows Vista Business 64-bit Edition
  • Windows Vista Enterprise 64-bit Edition
  • Windows Vista Ultimate 64-bit Edition
  • Windows Server 2008 Standard
  • Windows Server 2008 Enterprise
  • Windows Server 2008 Datacenter
  • Windows Server 2008 Standard without Hyper-V
  • Windows Server 2008 Datacenter without Hyper-V
  • Windows Server 2008 Enterprise without Hyper-V
  • Windows Server 2008 for Itanium-Based Systems
Keywords: 
kbautohotfix kbexpertiseinter kbfix kbbug kbsurveynew kbqfe kbhotfixserver KB973779
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