Click-to-Run is a new method by Microsoft to deliver Office 2010 to home users on a broadband connection. If you install Office 2010 using the Click-to-Run method, some add-ins, like PDFMaker, don't work correctly with Office 2010 applications. For example, you can't create PDFs from Office 2010 using PDFMaker. However, other methods for creating PDFs are available.
Note: For more information about Click-to-Run, see http://support.microsoft.com/kb/982431.