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FIX: A Stop error or a crash occurs on the operating system when you profile an application by using Visual Studio 2008 Service Pack 1

You may experience a Stop error, or the operating system may crash when you create a profile of an application by using Microsoft Visual Studio 2008 Service Pack 1 (SP1). The problem occurs when the following conditions are true:
  • You use the sampling profiling method.
  • The computer is running on the Intel Nehalem processor.
This problem occurs because the sampling profiler uses a driver in the operating system. However, the Intel Nehalem processor was created after the release of the 2008 version of the profiler. Because the sampling feature of the profiler is specific to the driver per processor, it was not possible to be completely compatible with the Nehalem processor before the release.

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 2008 Service Pack 1installed 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
Vsperfdrv90.sys9. 0.30729.16253,07216-Oct- 200810:30x86
Vsperfsys.catNot applicable8,47411-Dec- 200820:13x86
Vsperfsys.catNot applicable8,47411-Dec-200820:13x64
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
If you experience the same error when you use Microsoft Visual Studio 2005 SP1, apply hotfix 958840. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
958840 FIX: A Stop error or a crash occurs on the operating system when you profile an application by using Visual Studio 2005 Service Pack 1
For more information about Nehalem, visit the following Web site:For more information about how to analyze application performance by using profiling tools, visit the following Microsoft Web site:

Article ID: 958842 - Last Review: 02/23/2009 16:23:26 - Revision: 2.1

  • Microsoft Visual Studio 2008 Service Pack 1
  • kbhotfixserver kbexpertiseadvanced kbqfe kbsurveynew KB958842
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