Article ID: 810907 - View products that this article applies to.
Client computers that are running Windows XP Service Pack 1 (SP1) and that are configured to require Server Message Block (SMB) signing may drop SMB signing and may have problems communicating over your network. For example, you may experience any of the following symptoms:
Service pack informationTo resolve this problem, obtain the latest service pack for Microsoft Windows XP. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/322389/EN-US/ )How to obtain the latest Windows XP service pack
Hotfix informationA 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=supportNote 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. The English version of this fix has the file attributes (or later) 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 tool in Control Panel.
Windows XP Home Edition and Windows XP Professional:
Windows XP 64-Bit Edition:
Date Time Version Size File name ------------------------------------------------------ 18-Dec-2002 16:38 5.1.2600.1152 399,488 Mrxsmb.sys 18-Dec-2002 16:38 5.1.2600.1152 154,752 Rdbss.sys
Date Time Version Size File name -------------------------------------------------------- 18-Dec-2002 16:39 5.1.2600.1152 1,256,064 Mrxsmb.sys 18-Dec-2002 16:39 5.1.2600.1152 488,704 Rdbss.sys
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Microsoft Windows XP Service Pack 2.
Note that the information in this article supersedes the information that was previously available in Microsoft Knowledge Base article 331519. For additional information about related issues, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/812937/EN-US/ )File Lock or Access Denied Error Message When You Save Files over the Network
Article ID: 810907 - Last Review: August 29, 2007 - Revision: 4.2
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