FIX: Application performance deteriorates or the computer stops responding when you run a .NET Framework 1.1 SP1-based application on a Windows 2003-based computer

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When you run an application that is built on the Microsoft .NET Framework 1.1 with Service Pack 1 on a Microsoft Windows 2003-based computer, you may experience any of the following symptoms:
  • The performance of the .NET Framework 1.1 application deteriorates over time.
  • The computer stops responding. You have to restart the computer.
This problem occurs because the number of file mapping handles that are allocated to the process that uses the Corperfmonext.dll file continues to increase. Therefore, available memory decreases.

Service pack information

To resolve this problem, obtain the latest service pack for Windows Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
889100 How to obtain the latest service pack for Windows Server 2003

Hotfix information


This hotfix requires the .NET Framework 1.1 Service Pack 1.

Restart information

You do not have to restart your computer after you apply this hotfix.

Hotfix replacement information

This hotfix is not replaced by any later 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.
File nameFile versionFile sizeDateTimePlatformSP requirementService branch
Mscorlib.ldoNot Applicable10,94823-Aug-200613:01Not ApplicableSP1SP1QFE
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Microsoft Windows Server 2003 Service Pack 2.
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

Article ID: 924421 - Last Review: 01/17/2015 16:01:05 - Revision: 2.2

  • Microsoft .NET Framework 1.1 Service Pack 1
  • kbnosurvey kbarchive kbwinserv2003sp2fix kbnetframe110sp2fix kbbug kbhotfixserver kbfix kbqfe kbprb KB924421