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Note Unlike typical SMB requests, a long-term SMB request remains open until it is answered by the server. For example, a long-term request is sent when a client computer uses the FindFirstChangeNotification function to monitor a shared resource for changes.

In Windows Vista, the Server service intentionally limits the maximum number of concurrent asynchronous network requests to 64. A Windows Vista-based client computer also has this limitation. However, the file server processes typical SMB requests immediately.

Note If both of the file server and the client computer are Windows Vista-based computers, the SMB 2.0 protocol is used for file sharing operations.

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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.

Restart requirement

You have to restart your computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other previously released hotfixes.

Registry information

Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

To resolve this problem, modify the AsynchronousCredits registry entry on the file server to configure the maximum number of concurrent SMB requests. To do this, follow these steps:

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, 32-bit versions

Windows Vista, 64-bit versions

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For more information about SMB 2.0, visit the following Microsoft Web site:

For more information about the FindFirstChangeNotification function, visit the following Microsoft Web site:

For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base:

For more information about the terms that are used to describe software updates, click the following article number to view the article in the Microsoft Knowledge Base:

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