You receive an error message when you try to install the PowerPivot add-in on a computer that is running Windows Vista SP1 or Windows Server 2008

You have Microsoft Office 2010 installed on a computer that is running Windows Vista Service Pack 1 (SP1) or Windows Server 2008. When you try to install the PowerPivot add-in on the computer, you receive the following error message:

This problem occurs because the PowerPivot add-in requires the Windows Platform Update and one of the following operating systems to provide its user interface correctly:

• Windows Vista Service Pack 2(SP2)
• Windows Server 2008 SP2

To resolve this problem, upgrade to Windows Vista SP2 or Windows Server 2008 SP2, and then install the Platform Update for Windows Server 2008 and the Platform Update for Windows Vista before you install the add-in. For more information about how to install Windows Vista SP2, visit the following Microsoft Web site: The following file is available for download from the Microsoft Download Center:
Download the Windows6.0-KB948465-X86.exe package now. For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base: Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file. For more information about the Platform Update for Windows Server 2008 and the Platform Update for Windows Vista, click the following article number to view the article in the Microsoft Knowledge Base:

You must be running Windows Server 2008, Windows Vista SP1, or a later version in order to run Office 2010. However, the PowerPivot add-in uses the Windows Foundation Services in the Windows Platform Update to provide the PowerPivot user interface in Windows Vista and in Windows Server 2008. The Windows Platform Update requires Windows Vista SP2 or Windows Server 2008 SP2. The Windows Foundation Services are included in Windows 7 and in Windows Server 2008 R2.

This behavior is by design.