Open Software Solutions

Consider the following scenario:

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The following policies are enabled on a domain controller that is running Windows Server 2003 in a domain: • Computer Configuration Windows Settings Security Settings Local Policies Security Options Microsoft network server: Digitally sign communications (always) • Computer Configuration Windows Settings Security Settings Local Policies Security Options Microsoft network server: Digitally sign communications (if client agrees)

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The following policies are enabled on a member computer that is running Windows Vista Service Pack 1 or Windows Server 2008 in the same domain: • Computer Configuration Windows Settings Security Settings Local Policies Security Options Microsoft network client: Digitally sign communications (always) • Computer Configuration Windows Settings Security Settings Local Policies Security Options Microsoft network client: Digitally sign communications (If server agrees)

In this scenario, Group Policy settings are not applied on the member computer. Additionally, the following event is logged in the System log on the member computer:

Date: Date
Event ID: 1058
Level: Error
Keywords:
User: UserSID
Computer: CompuerName
Description:
The processing of Group Policy failed. Windows attempted to read the file path gpt.ini from a domain controller and was not successful. Group Policy settings may not be applied until this event is resolved. This issue may be transient and could be caused by one or more of the following:
a) Name Resolution/Network Connectivity to the current domain controller.
b) File Replication Service Latency (a file created on another domain controller has not replicated to the current domain controller).
c) The Distributed File System (DFS) client has been disabled.

Note This problem occurs only on member computers that are running Windows Server 2008 or Windows Vista Service Pack 1 (SP1). It does not occur on member computers that are running Windows Server 2003, Windows XP, or the release version of Windows Vista.

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When a Server Message Block (SMB) version 1 client establishes a non-guest session or a non-anonymous session with a server, the client enables security signatures for the server. Later sessions then inherit the security signature sequence that is already established.

To improve security, Windows Server 2008 and Windows Vista SP1 prevent server authenticated connections from being maliciously downgraded to a guest session or to an anonymous session. However, this improved security does not address the scenario that is described in the Symptoms section.

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Windows Server 2008 hotfix information

A supported hotfix is now 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 service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

Note If additional issues occur or 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. To create a separate service request, visit the following Microsoft Web site:

Prerequisites

No prerequisites are required to apply this hotfix.

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 2008, x86-based versions

File name	File version	File size	Date	Time	Platform
Mrxsmb10.sys	6.0.6001.22156	211,968	12-Apr-2008	00:43	x86

Windows Server 2008, Itanium-based versions

File name	File version	File size	Date	Time	Platform
Mrxsmb10.sys	6.0.6001.22156	655,360	12-Apr-2008	00:54	IA-64

Windows Server 2008, x64-based versions

File name	File version	File size	Date	Time	Platform
Mrxsmb10.sys	6.0.6001.22156	272,384	12-Apr-2008	01:17	x64

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Windows Vista Service Pack 1 hotfix information

A supported hotfix is now 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 service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

Note If additional issues occur or 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. To create a separate service request, visit the following Microsoft Web site:

Prerequisites

To apply this hotfix, you must have Windows Vista SP1 installed.

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 with Service Pack 1, x86-based versions

File name	File version	File size	Date	Time	Platform
Mrxsmb10.sys	6.0.6001.22156	211,968	12-Apr-2008	00:43	x86

Windows Vista with Service Pack 1, Itanium-based versions

File name	File version	File size	Date	Time	Platform
Mrxsmb10.sys	6.0.6001.22156	655,360	12-Apr-2008	00:54	IA-64

Windows Vista with Service Pack 1, x64-based versions

File name	File version	File size	Date	Time	Platform
Mrxsmb10.sys	6.0.6001.22156	272,384	12-Apr-2008	01:17	x64

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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:

To work around this problem, use one of the following methods.

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Method 1

Disable the following policy on the member computers that are running Windows Server 2008 or Windows Vista SP1:

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Method 2

On the member computers that are running Windows Server 2008 or Windows Vista SP1, follow these steps:

1.	Click Start, type regedit in the Start Search box, and then press ENTER.
2.	Locate the RequireSecuritySignature registry entry under the following registry subkey: HKEY_LOCAL_MACHINE SYSTEM CurrentControlSet Services lanmanworkstation parameters
3.	Right-click RequireSecuritySignature, and then click Modify.
4.	In the Value data box, type 0, and then click OK.
5.	Exit Registry Editor.

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Method 3

On the member computers that are running Windows Server 2008 or Windows Vista Service Pack 1, follow these steps:

1.	Click Start, type regedit in the Start Search box, and then press ENTER.
2.	Locate the AllowGuestAuthWhenSigningRequired registry entry under the following registry subkey: HKEY_LOCAL_MACHINE SYSTEM CurrentControlSet Services lanmanworkstation parameters
3.	Right-click AllowGuestAuthWhenSigningRequired, and then click Modify.
4.	In the Value data box, type 1, and then click OK.
5.	Exit Registry Editor.

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

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For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

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