Error message when you try to open a 2007 Office file in a document library in a SharePoint Portal Server 2001 or SharePoint Team Services site: "Microsoft Office <ProgramName> cannot access the file"

Consider the following scenario. You upload a 2007 Microsoft Office file to a document library in a Microsoft SharePoint Server 2001 site or in a SharePoint Team Services from Microsoft site. You connect to the document library from a computer that is running Windows Vista. Then, you click the file to open it for the first time. The file opens in the 2007 Office program as expected. However, when you try to open the file again, you receive an error message that resembles the following error message:If you log off and then log on to the computer, the same behavior occurs.

SharePoint Portal Server 2001 and SharePoint Team Services do not support 2007 Office files on Windows Vista. You may experience unexpected behavior when you try to access a 2007 Office file on a SharePoint Portal Server 2001 site or on a SharePoint Team Services site from a computer that is running Windows Vista.