Microsoft KB Archive/926764

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Article ID: 926764

Article Last Modified on 3/23/2007


  • Microsoft .NET Framework 1.1


In the Microsoft .NET Framework 1.1, a memory leak may occur when you use the System.Diagnostics.PerformanceCounter class to read performance data from a remote computer.


This problem occurs if the remote computer is unavailable.


Hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.


You must have the .NET Framework 1.1 Service Pack 1 (SP1) installed to apply this hotfix.

Restart requirement

You do not have to 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.

The .NET Framework 1.1 with SP1
File name File version File size Date Time
System.dll 1.1.4322.2380 1,232,896 14-Oct-2006 02:07
The .NET Framework 1.1 with SP1 for Microsoft Windows Server 2003 with SP1
File name File version File size Date Time
Sy52106.dll 1.1.4322.2380 1,232,896 30-Oct-2006 07:44


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


Before you apply this hotfix, you will experience a 128-kilobyte (KB) memory leak every time that you try to read performance data from a remote computer that is unavailable. This memory leak does not occur when the remote computer is available on the network.

Note This issue does not occur in the .NET Framework 2.0.

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

824684 Description of the standard terminology that is used to describe Microsoft software updates

Keywords: kbwinserv2003sp2fix kbnetframe110presp2fix kbbug kbfix kbqfe kbhotfixserver kbpubtypekc KB926764