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

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 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 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:

Open Registry Editor. To do this, click
Start, type regedit in the
Start Search box, and then press ENTER.
Locate and then right-click the following registry subkey:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\dot3svc
Point to New, and then click DWORD Value.
Type BlockTime, and then press ENTER.
Right-click BlockTime, and then click
Modify.
Click Decimal under
Base.
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.
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:

Open Registry Editor. To do this, click
Start, type regedit in the
Start Search box, and then press ENTER.
Locate and then right-click the following registry subkey:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\wlansvc
Point to New, and then click DWORD Value.
Type BlockTime, and then press ENTER.
Right-click BlockTime, and then click
Modify.
Click Decimal under
Base.
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.
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.
Version Product Milestone Service branch
6.0.6001.22xxx Windows Vista SP1 and Windows Server 2008 SP1 SP1 LDR
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

File name	File version	File size	Date	Time	Platform
Dot3.mof	Not Applicable	6,072	18-Dec-2007	21:01	Not Applicable
Dot3.tmf	Not Applicable	290,156	20-Sep-2008	01:43	Not Applicable
Dot3api.dll	6.0.6001.22271	45,056	20-Sep-2008	04:00	x86
Dot3dlg.dll	6.0.6001.22271	45,568	20-Sep-2008	04:00	x86
Dot3msm.dll	6.0.6001.22271	74,752	20-Sep-2008	04:00	x86
Dot3svc.dll	6.0.6001.22271	175,616	20-Sep-2008	04:00	x86
Dot3ui.dll	6.0.6001.22271	142,848	20-Sep-2008	04:00	x86
Gatherwiredinfo.vbs	Not Applicable	12,198	18-Dec-2007	21:01	Not Applicable
Gatherwiredinfo.xslt	Not Applicable	743	18-Dec-2007	21:01	Not Applicable
Lan diagnostics.xml	Not Applicable	48,186	18-Dec-2007	21:01	Not Applicable
Report.system.netdiagframework.xml	Not Applicable	29,356	18-Dec-2007	21:01	Not Applicable
Report.system.wired.xml	Not Applicable	19,290	18-Dec-2007	21:01	Not Applicable
Rules.system.netdiagframework.xml	Not Applicable	57,286	18-Dec-2007	21:01	Not Applicable
Rules.system.wired.xml	Not Applicable	43,808	18-Dec-2007	21:01	Not Applicable
Gatherwirelessinfo.vbs	Not Applicable	15,181	18-Dec-2007	21:24	Not Applicable
Gatherwirelessinfo.xslt	Not Applicable	933	18-Dec-2007	21:24	Not Applicable
Report.system.wireless.xml	Not Applicable	59,620	18-Dec-2007	21:24	Not Applicable
Rules.system.wireless.xml	Not Applicable	164,452	18-Dec-2007	21:24	Not Applicable
Wireless diagnostics.xml	Not Applicable	33,857	18-Dec-2007	21:24	Not Applicable
Wlan.mof	Not Applicable	12,880	18-Dec-2007	21:24	Not Applicable
Wlan.tmf	Not Applicable	1,675,370	20-Sep-2008	01:43	Not Applicable
Wlanapi.dll	6.0.6001.22271	64,512	20-Sep-2008	04:00	x86
Wlanhlp.dll	6.0.6001.22271	68,096	20-Sep-2008	04:00	x86
Wlanmsm.dll	6.0.6001.22271	293,376	20-Sep-2008	04:00	x86
Wlansec.dll	6.0.6001.22271	302,592	20-Sep-2008	04:00	x86
Wlansvc.dll	6.0.6001.22271	514,048	20-Sep-2008	04:00	x86

For all supported 64-bit versions of Windows Server 2008 and of Windows Vista

File name	File version	File size	Date	Time	Platform
Dot3.mof	Not Applicable	6,072	18-Dec-2007	21:01	Not Applicable
Dot3.tmf	Not Applicable	309,355	20-Sep-2008	02:14	Not Applicable
Dot3api.dll	6.0.6001.22271	59,904	20-Sep-2008	04:19	x64
Dot3dlg.dll	6.0.6001.22271	55,296	20-Sep-2008	04:19	x64
Dot3msm.dll	6.0.6001.22271	92,160	20-Sep-2008	04:19	x64
Dot3svc.dll	6.0.6001.22271	208,896	20-Sep-2008	04:19	x64
Dot3ui.dll	6.0.6001.22271	154,624	20-Sep-2008	04:19	x64
Gatherwiredinfo.vbs	Not Applicable	12,198	18-Dec-2007	21:01	Not Applicable
Gatherwiredinfo.xslt	Not Applicable	743	18-Dec-2007	21:01	Not Applicable
Lan diagnostics.xml	Not Applicable	48,186	18-Dec-2007	21:01	Not Applicable
Report.system.netdiagframework.xml	Not Applicable	29,356	18-Dec-2007	21:01	Not Applicable
Report.system.wired.xml	Not Applicable	19,290	18-Dec-2007	21:01	Not Applicable
Rules.system.netdiagframework.xml	Not Applicable	57,286	18-Dec-2007	21:01	Not Applicable
Rules.system.wired.xml	Not Applicable	43,808	18-Dec-2007	21:01	Not Applicable
Gatherwirelessinfo.vbs	Not Applicable	15,181	18-Dec-2007	21:24	Not Applicable
Gatherwirelessinfo.xslt	Not Applicable	933	18-Dec-2007	21:24	Not Applicable
Report.system.wireless.xml	Not Applicable	59,620	18-Dec-2007	21:24	Not Applicable
Rules.system.wireless.xml	Not Applicable	164,452	18-Dec-2007	21:24	Not Applicable
Wireless diagnostics.xml	Not Applicable	33,857	18-Dec-2007	21:24	Not Applicable
Wlan.mof	Not Applicable	12,880	18-Dec-2007	21:24	Not Applicable
Wlan.tmf	Not Applicable	1,747,635	20-Sep-2008	02:14	Not Applicable
Wlanapi.dll	6.0.6001.22271	86,528	20-Sep-2008	04:19	x64
Wlanhlp.dll	6.0.6001.22271	97,792	20-Sep-2008	04:19	x64
Wlanmsm.dll	6.0.6001.22271	353,792	20-Sep-2008	04:19	x64
Wlansec.dll	6.0.6001.22271	376,320	20-Sep-2008	04:19	x64
Wlansvc.dll	6.0.6001.22271	616,448	20-Sep-2008	04:19	x64
Dot3.mof	Not Applicable	6,072	18-Dec-2007	21:01	Not Applicable
Dot3api.dll	6.0.6001.22271	45,056	20-Sep-2008	04:00	x86
Dot3dlg.dll	6.0.6001.22271	45,568	20-Sep-2008	04:00	x86
Dot3msm.dll	6.0.6001.22271	74,752	20-Sep-2008	04:00	x86
Dot3ui.dll	6.0.6001.22271	142,848	20-Sep-2008	04:00	x86
Wlan.mof	Not Applicable	12,880	18-Dec-2007	21:24	Not Applicable
Wlanapi.dll	6.0.6001.22271	64,512	20-Sep-2008	04:00	x86
Wlanhlp.dll	6.0.6001.22271	68,096	20-Sep-2008	04:00	x86
Wlanmsm.dll	6.0.6001.22271	293,376	20-Sep-2008	04:00	x86
Wlansec.dll	6.0.6001.22271	302,592	20-Sep-2008	04:00	x86