FIX: Error message when you access a Commerce Server site that is hosted on a computer that has hyper-threading enabled on two quad-core processors: "There are too many processors on this computer"

Consider the following scenario:

• You have Microsoft Commerce Server 2007 Standard Edition or Microsoft Commerce Server 2009 Standard Edition installed on a computer that has two quad-core processors.
• You enable the hyper-threading feature.
• You try to access a Web site in Commerce Server 2007 Standard Edition or in Commerce Server 2009 Standard Edition.

In this scenario, you receive the following error message:However, Commerce Server 2007 Standard Edition and Commerce Server 2009 Standard Edition can each support as many as two physical processors. Additionally, the processors can have hyper-threading enabled.

Note This problem does not occur if you disable the hyper-threading feature.

This problem occurs because of an error in the Csboot.dll file. This error causes Commerce Server to think that the server has 16 processors even though the server has two quad-core processors with hyper-threading enabled. Commerce Server 2007 Standard Edition and Commerce Server 2009 Standard Edition cannot have more than two physical processors on each server.

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.

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, submit a request to 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.

Prerequisites

You must have Commerce Server 2007 Service Pack 2 (SP2) or Commerce Server 2009 installed to apply this hotfix.

Restart requirement

You must 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.

For all supported x86-based versions of Commerce Server 2007

For all supported x64-based versions of Commerce Server 2007

For all supported x86-based versions of Commerce Server 2009

For all supported x64-based versions of Commerce Server 2009

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

For more information about Commerce Server editions, visit the following Microsoft Web sites: For more information about hyper-threading technology, visit the following Microsoft Web site: