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FIX: Visual Studio 2005 stops responding or performance is slow when you use the IntelliSense feature

In Microsoft Visual Studio 2005, you may experience slow performance, or Visual Studio 2005 may stop responding. This problem occurs when one of the following conditions is true:
  • You try to use the IntelliSense feature to obtain information on fields, methods, or properties on objects, pointers, or classes.For example, you use the following syntax:
  • You try to obtain the explanation for a method or a template by using one of the following syntaxes:
    • Function(
    • Template<
  • You scroll through a very long source code window. This problem especially occurs when the functions in the source code window are very long.
  • You switch between the choices in the Active solution configuration drop-down list in the Configuration Manager dialog box.
This problem occurs because of the current locking mechanism on the IntelliSense feature. This mechanism prevents concurrent access from multiple threads.
This hotfix has been replaced by hotfix 947315. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
947315 FIX: The Visual Studio 2005 IDE stops responding when you work with Visual C++ projects

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.

To download this hotfix from the MSDN Code Gallery, visit the following Microsoft Web site:

Note The MSDN Code Gallery displays the languages for which the hotfix is available. If you do not see your language listed, it is because the Code Gallery resource page is not available for that language.

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:


You must have Visual Studio 2005 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.
File nameFile versionFile sizeDateTimePlatform
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
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: 943969 - Last Review: 10/08/2011 12:39:00 - Revision: 4.0

  • Microsoft Visual Studio 2005 Professional Edition
  • Microsoft Visual Studio 2005 Standard Edition
  • kbfix kbexpertiseadvanced kbqfe KB943969