You experience connectivity issues when you run a program that accesses data on a computer that is running Windows Server 2003 or Windows XP

When you run a program that performs byte-range locking operations and that accesses data on a computer that is running Microsoft Windows Server 2003 or Microsoft Windows XP, you experience connectivity issues. This problem occurs when you map a network drive to a shared folder on the server and then run the program. For example, the connection unexpectedly ends, or you cannot connect to the server. You may receive an error message that is similar to the following: The error message may vary depending on the program.

This problem occurs when a blank Server Message Block (SMB) packet is sent to the server from a client after the client resubmits the SMB packet to the server.

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 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: 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

No prerequisites are required.

Restart requirement

You must restart the computer after you install 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 tool in Control Panel.

Windows Server 2003, 32-bit versions

Windows Server 2003, 64-Bit Enterprise Edition

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

For additional information about how to resolve this issue in Microsoft Windows XP, click the following article number to view the article in the Microsoft Knowledge Base: For additional information about the terminology that is used to describe Microsoft software updates, click the following article number to view the article in the Microsoft Knowledge Base: