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Article ID: 957931 - Last Review: October 9, 2011 - Revision: 5.0

Hotfix Download Available
View and request hotfix downloads
 
Support for Windows Vista Service Pack 1 (SP1) ends on July 12, 2011. To continue receiving security updates for Windows, make sure you're running Windows Vista with Service Pack 2 (SP2). For more information, refer to this Microsoft web page: Support is ending for some versions of Windows (http://windows.microsoft.com/en-us/windows/help/end-support-windows-xp-sp2-windows-vista-without-service-packs) .

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SYMPTOMS

Consider the following scenario:
  • You have a computer that is running Windows Vista, Windows Server 2008, or Windows XP in a networked environment.
  • You enabled 802.1X authentication for a network connection on the computer.
  • The 802.1X authentication fails because of some transient error conditions.
In this scenario, the computer does not respond to any other authentication requests for 20 minutes. Therefore, the computer cannot access the network, or the computer only has limited access to the network.

CAUSE

This problem occurs because the system enters a blocking period that prevents the network from being overloaded with potentially unsuccessful authentications. During this blocking period, the system does not respond to EAPOL-Identity messages from the network access server (NAP). This blocking period is hardcoded to 20 minutes.

RESOLUTION

After you apply this hotfix, you can set a registry entry to configure the blocking period for failed 802.1X authentications. For more information, see the "Registry information" section.

Hotfix information for Windows Vista and Windows Server 2008

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.

Prerequisites

To apply this hotfix on a Windows Vista-based computer, you must have Windows Vista Service Pack 1 installed on the computer. 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 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.

Registry information

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756  (http://support.microsoft.com/kb/322756/ ) How to back up and restore the registry in Windows
For wired networks

To use the new registry setting in a wired network, follow these steps:
  1. Open Registry Editor. To do this, click Start, type regedit in the Start Search box, and then press ENTER.
  2. Locate and then right-click the following registry subkey:
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\dot3svc
  3. Point to New, and then click DWORD Value.
  4. Type BlockTime, and then press ENTER.
  5. Right-click BlockTime, and then click Modify.
  6. Click Decimal under Base.
  7. In the Value data box, type an appropriate value for the blocking period, and then click OK. The value that you specify for this registry entry represents the number of minutes that the system waits before it retries a failed authentication. The default value is 20 and the valid range is 1 - 60. If you set this key to 0, it will not apply at all.
  8. Exit Registry Editor.
For wireless networks

Note Windows XP SP3 is only affected when you are using Wired 802.1X authentication. It is not affected when you are using Wireless networks.

To use the new registry setting in a wireless network, follow these steps:
  1. Open Registry Editor. To do this, click Start, type regedit in the Start Search box, and then press ENTER.
  2. Locate and then right-click the following registry subkey:
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\wlansvc
  3. Point to New, and then click DWORD Value.
  4. Type BlockTime, and then press ENTER.
  5. Right-click BlockTime, and then click Modify.
  6. Click Decimal under Base.
  7. In the Value data box, type an appropriate value for the blocking period, and then click OK. The value that you specify for this registry entry represents the number of minutes that the system waits before it retries a failed authentication. The default value is 20 and the valid range is 1 - 60. If you set this key to 0, it will not apply at all.
  8. Exit Registry Editor.

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 files that apply to a specific product, milestone (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
    VersionProductMilestoneService branch
    6.0.6001.22xxxWindows Vista SP1 and Windows Server 2008 SP1SP1LDR
  • Service Pack 1 is integrated into Windows Server 2008.
  • 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 32-bit versions of Windows Server 2008 and of Windows Vista
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Dot3.mofNot Applicable6,07218-Dec-200721:01Not Applicable
Dot3.tmfNot Applicable290,15620-Sep-200801:43Not Applicable
Dot3api.dll6.0.6001.2227145,05620-Sep-200804:00x86
Dot3dlg.dll6.0.6001.2227145,56820-Sep-200804:00x86
Dot3msm.dll6.0.6001.2227174,75220-Sep-200804:00x86
Dot3svc.dll6.0.6001.22271175,61620-Sep-200804:00x86
Dot3ui.dll6.0.6001.22271142,84820-Sep-200804:00x86
Gatherwiredinfo.vbsNot Applicable12,19818-Dec-200721:01Not Applicable
Gatherwiredinfo.xsltNot Applicable74318-Dec-200721:01Not Applicable
Lan diagnostics.xmlNot Applicable48,18618-Dec-200721:01Not Applicable
Report.system.netdiagframework.xmlNot Applicable29,35618-Dec-200721:01Not Applicable
Report.system.wired.xmlNot Applicable19,29018-Dec-200721:01Not Applicable
Rules.system.netdiagframework.xmlNot Applicable57,28618-Dec-200721:01Not Applicable
Rules.system.wired.xmlNot Applicable43,80818-Dec-200721:01Not Applicable
Gatherwirelessinfo.vbsNot Applicable15,18118-Dec-200721:24Not Applicable
Gatherwirelessinfo.xsltNot Applicable93318-Dec-200721:24Not Applicable
Report.system.wireless.xmlNot Applicable59,62018-Dec-200721:24Not Applicable
Rules.system.wireless.xmlNot Applicable164,45218-Dec-200721:24Not Applicable
Wireless diagnostics.xmlNot Applicable33,85718-Dec-200721:24Not Applicable
Wlan.mofNot Applicable12,88018-Dec-200721:24Not Applicable
Wlan.tmfNot Applicable1,675,37020-Sep-200801:43Not Applicable
Wlanapi.dll6.0.6001.2227164,51220-Sep-200804:00x86
Wlanhlp.dll6.0.6001.2227168,09620-Sep-200804:00x86
Wlanmsm.dll6.0.6001.22271293,37620-Sep-200804:00x86
Wlansec.dll6.0.6001.22271302,59220-Sep-200804:00x86
Wlansvc.dll6.0.6001.22271514,04820-Sep-200804:00x86
For all supported 64-bit versions of Windows Server 2008 and of Windows Vista
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Dot3.mofNot Applicable6,07218-Dec-200721:01Not Applicable
Dot3.tmfNot Applicable309,35520-Sep-200802:14Not Applicable
Dot3api.dll6.0.6001.2227159,90420-Sep-200804:19x64
Dot3dlg.dll6.0.6001.2227155,29620-Sep-200804:19x64
Dot3msm.dll6.0.6001.2227192,16020-Sep-200804:19x64
Dot3svc.dll6.0.6001.22271208,89620-Sep-200804:19x64
Dot3ui.dll6.0.6001.22271154,62420-Sep-200804:19x64
Gatherwiredinfo.vbsNot Applicable12,19818-Dec-200721:01Not Applicable
Gatherwiredinfo.xsltNot Applicable74318-Dec-200721:01Not Applicable
Lan diagnostics.xmlNot Applicable48,18618-Dec-200721:01Not Applicable
Report.system.netdiagframework.xmlNot Applicable29,35618-Dec-200721:01Not Applicable
Report.system.wired.xmlNot Applicable19,29018-Dec-200721:01Not Applicable
Rules.system.netdiagframework.xmlNot Applicable57,28618-Dec-200721:01Not Applicable
Rules.system.wired.xmlNot Applicable43,80818-Dec-200721:01Not Applicable
Gatherwirelessinfo.vbsNot Applicable15,18118-Dec-200721:24Not Applicable
Gatherwirelessinfo.xsltNot Applicable93318-Dec-200721:24Not Applicable
Report.system.wireless.xmlNot Applicable59,62018-Dec-200721:24Not Applicable
Rules.system.wireless.xmlNot Applicable164,45218-Dec-200721:24Not Applicable
Wireless diagnostics.xmlNot Applicable33,85718-Dec-200721:24Not Applicable
Wlan.mofNot Applicable12,88018-Dec-200721:24Not Applicable
Wlan.tmfNot Applicable1,747,63520-Sep-200802:14Not Applicable
Wlanapi.dll6.0.6001.2227186,52820-Sep-200804:19x64
Wlanhlp.dll6.0.6001.2227197,79220-Sep-200804:19x64
Wlanmsm.dll6.0.6001.22271353,79220-Sep-200804:19x64
Wlansec.dll6.0.6001.22271376,32020-Sep-200804:19x64
Wlansvc.dll6.0.6001.22271616,44820-Sep-200804:19x64
Dot3.mofNot Applicable6,07218-Dec-200721:01Not Applicable
Dot3api.dll6.0.6001.2227145,05620-Sep-200804:00x86
Dot3dlg.dll6.0.6001.2227145,56820-Sep-200804:00x86
Dot3msm.dll6.0.6001.2227174,75220-Sep-200804:00x86
Dot3ui.dll6.0.6001.22271142,84820-Sep-200804:00x86
Wlan.mofNot Applicable12,88018-Dec-200721:24Not Applicable
Wlanapi.dll6.0.6001.2227164,51220-Sep-200804:00x86
Wlanhlp.dll6.0.6001.2227168,09620-Sep-200804:00x86
Wlanmsm.dll6.0.6001.22271293,37620-Sep-200804:00x86
Wlansec.dll6.0.6001.22271302,59220-Sep-200804:00x86

Hotfix information for Windows XP

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.

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, submit a request to 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, Windows XP SP3 must be installed 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

Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatformSP requirementService branch
Dot3svc.dll5.1.2600.5745132,09620-Jan-200915:14x86SP3SP3QFE

STATUS

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

WORKAROUND

If you are using a wired connection for networking, this problem is temporarily resolved after you disconnect and then reconnect the network cable.

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 Server 2008 and for Windows Vista

Additional files for all supported 32-bit versions of Windows Server 2008 and of Windows Vista

Collapse this tableExpand this table
File namePackage_1_for_kb957931~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,925
Date (UTC)22-Sep-2008
Time (UTC)18:44
PlatformNot Applicable
File namePackage_2_for_kb957931~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,942
Date (UTC)22-Sep-2008
Time (UTC)18:44
PlatformNot Applicable
File namePackage_3_for_kb957931~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,780
Date (UTC)22-Sep-2008
Time (UTC)18:44
PlatformNot Applicable
File namePackage_4_for_kb957931~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,766
Date (UTC)22-Sep-2008
Time (UTC)18:44
PlatformNot Applicable
File namePackage_for_kb957931_client_1~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,803
Date (UTC)22-Sep-2008
Time (UTC)18:44
PlatformNot Applicable
File namePackage_for_kb957931_client~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,430
Date (UTC)22-Sep-2008
Time (UTC)18:44
PlatformNot Applicable
File namePackage_for_kb957931_server_0~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,905
Date (UTC)22-Sep-2008
Time (UTC)18:44
PlatformNot Applicable
File namePackage_for_kb957931_server~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,431
Date (UTC)22-Sep-2008
Time (UTC)18:44
PlatformNot Applicable
File nameX86_7aa1285edaea08cca8617dd24c1b9a15_31bf3856ad364e35_6.0.6001.22271_none_5566aa6c7dc05eea.manifest
File versionNot Applicable
File size695
Date (UTC)22-Sep-2008
Time (UTC)18:44
PlatformNot Applicable
File nameX86_991a07543684aa8ce7a9e86079cb8579_31bf3856ad364e35_6.0.6001.22271_none_ab8792bcec08b285.manifest
File versionNot Applicable
File size695
Date (UTC)22-Sep-2008
Time (UTC)18:44
PlatformNot Applicable
File nameX86_microsoft-windows-dot3svc_31bf3856ad364e35_6.0.6001.22271_none_6baafe4f8cd9c5d9.manifest
File versionNot Applicable
File size60,849
Date (UTC)20-Sep-2008
Time (UTC)04:40
PlatformNot Applicable
File nameX86_microsoft-windows-wlansvc_31bf3856ad364e35_6.0.6001.22271_none_9c8331da1e3b9b17.manifest
File versionNot Applicable
File size76,282
Date (UTC)20-Sep-2008
Time (UTC)04:38
PlatformNot Applicable

Additional files for all supported 64-bit versions of Windows Server 2008 and of Windows Vista

Collapse this tableExpand this table
File nameAmd64_4c6c2a571130db66e4888bedd050050b_31bf3856ad364e35_6.0.6001.22271_none_0e86157f9e43bc00.manifest
File versionNot Applicable
File size1,040
Date (UTC)22-Sep-2008
Time (UTC)18:44
PlatformNot Applicable
File nameAmd64_6cfbfbc161facfaf45f3b07726231f98_31bf3856ad364e35_6.0.6001.22271_none_602c751a582b7c32.manifest
File versionNot Applicable
File size1,040
Date (UTC)22-Sep-2008
Time (UTC)18:44
PlatformNot Applicable
File nameAmd64_microsoft-windows-dot3svc_31bf3856ad364e35_6.0.6001.22271_none_c7c999d34537370f.manifest
File versionNot Applicable
File size60,909
Date (UTC)20-Sep-2008
Time (UTC)04:54
PlatformNot Applicable
File nameAmd64_microsoft-windows-wlansvc_31bf3856ad364e35_6.0.6001.22271_none_f8a1cd5dd6990c4d.manifest
File versionNot Applicable
File size76,352
Date (UTC)20-Sep-2008
Time (UTC)04:52
PlatformNot Applicable
File namePackage_1_for_kb957931~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size2,152
Date (UTC)22-Sep-2008
Time (UTC)18:44
PlatformNot Applicable
File namePackage_2_for_kb957931~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size2,169
Date (UTC)22-Sep-2008
Time (UTC)18:44
PlatformNot Applicable
File namePackage_3_for_kb957931~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size2,005
Date (UTC)22-Sep-2008
Time (UTC)18:44
PlatformNot Applicable
File namePackage_4_for_kb957931~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,991
Date (UTC)22-Sep-2008
Time (UTC)18:44
PlatformNot Applicable
File namePackage_for_kb957931_client_1~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,815
Date (UTC)22-Sep-2008
Time (UTC)18:44
PlatformNot Applicable
File namePackage_for_kb957931_client~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,438
Date (UTC)22-Sep-2008
Time (UTC)18:44
PlatformNot Applicable
File namePackage_for_kb957931_server_0~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,917
Date (UTC)22-Sep-2008
Time (UTC)18:44
PlatformNot Applicable
File namePackage_for_kb957931_server~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,439
Date (UTC)22-Sep-2008
Time (UTC)18:44
PlatformNot Applicable
File nameWow64_microsoft-windows-dot3svc_31bf3856ad364e35_6.0.6001.22271_none_d21e44257997f90a.manifest
File versionNot Applicable
File size47,457
Date (UTC)20-Sep-2008
Time (UTC)04:28
PlatformNot Applicable
File nameWow64_microsoft-windows-wlansvc_31bf3856ad364e35_6.0.6001.22271_none_02f677b00af9ce48.manifest
File versionNot Applicable
File size66,190
Date (UTC)20-Sep-2008
Time (UTC)04:28
PlatformNot Applicable

APPLIES TO
  • Windows Vista Starter
  • Windows Vista Home Premium
  • Windows Vista Home Basic
  • Windows Vista Enterprise
  • Windows Vista Business
  • Windows Vista Ultimate
  • 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
  • Windows Vista Service Pack 1
  • 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 Standard without Hyper-V
  • Windows Web Server 2008
  • Microsoft Windows XP Home Edition
  • Microsoft Windows XP Professional
Keywords: 
kbautohotfix kbexpertiseinter kbbug kbfix kbqfe KB957931
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