Queries to SNMP devices stop responding when Windows Server 2008-based systems or Windows Vista Service Pack 1-based systems receive multiple SNMP WMI queries at the same time

When a Windows Server 2008-based system or a Windows Vista Service Pack 1 (SP1)-based system that has the Simple Network Management Protocol (SNMP) Windows Management Instrumentation (WMI) provider feature enabled receives multiple SNMP WMI queries at the same time, queries to SNMP devices stop responding. The queries do not return data. WMI queries for SNMP devices fail.

The problem occurs because of the SNMP WMI provider. A deadlock situation occurs when the SNMP WMI provider handles multiple WMI queries at the same time.

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem is that described in this article. Apply this hotfix only to systems that are experiencing the problem is described in this article. 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.

Important Windows Vista and Windows Server 2008 hotfixes are included in the same packages. However, only one of these products may be listed on the �Hotfix Request� page. To request the hotfix package that applies to both Windows Vista and Windows Server 2008, just select the product that is listed on the page.

Prerequisites

You must have Windows Server 2008 or Windows Vista Service Pack 1 (SP1) installed to apply this hotfix.

Restart requirement

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

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

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/Windows Vista SP1 X86

Windows Server 2008 IA64

Windows Server 2008/Windows Vista SP1 x64

Windows Server 2008/Windows Vista SP1 x86 other files

Windows Server 2008 IA64 other files

Windows Server 2008/Windows Vista SP1 x64 other files

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

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