I am a teacher, and I have downloaded free Microsoft Office Professional 2007 on my new computer. When I try to install, it gives me error 25004.Config.Xml. I cannot even open a Word file (which was read-only it seems that I am not having product key). But I am having a product key, it is well recognized when I run Microsoft Office Professional 2007 but it remains locked to error 25004 and I cannot save from Word since no file opens up, what to do? Why Office 2007 installation gives error 25004 config.xml not specified.