FIX: When you try to install Commerce Server 2009 on a computer that is running Windows Server 2008 R2, the installation fails

Symptoms

When you try to install Microsoft Commerce Server 2009 on a computer that is running Windows Server 2008 R2, the installation fails. Additionally, you receive the following error message:

.NET Framework 3.5 with SP1 is not present on the computer. You must install the .NET Framework 3.5 with SP1 to continue with this installation.

Note This problem occurs even if you have the .NET Framework 3.5 Service Pack 1 (SP1) or later versions of the .NET Framework installed.

Cause

During the installation of Commerce Server 2009, the installation program searches for a specific registry key to locate the .NET Framework 3.5 SP1. However, the version of the .NET Framework that is integrated with Windows Server 2008 R2 does not have the registry key in question. Therefore, the installation program stops responding.

Resolution

To resolve this problem, apply the following hotfix on the computer that is running Windows Server 2008 R2 before you install Commerce Server 2009.

This hotfix does not update any files on your computer. This hotfix will create the registry entries that are required by the Commerce Server 2009 installer. If the required registry entries already exist, the system will display the following message:

You don't need to apply this patch to this machine.We strongly recommend that you remove this hotfix after you have successfully installed Commerce Server 2009. You can uninstall the hotfix by using the Programs and Features item in Control Panel.

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: -

http://support.microsoft.com/contactus/?ws=supportNote 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 Windows Server 2008 R2 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.

Status

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

More Information

Support is available for running the following versions of Commerce Server on Windows Server 2008 R2:

Commerce Server 2009
Commerce Server 2007 Service Pack 2 (SP2)

When you upgrade from Windows Server 2008 to Windows Server 2008 R2, Microsoft Commerce Server 2007 SP2 and Commerce Server 2009 do work as expected.