Previously I used power Point Viewer 2003 with no problems. I received some pps files that needed to be opened with 2007. So I downloaded it. It will only open these files if they are saved to desktop first. I cannot open from Outlook Express. I keep getting pop up telling me "This file does not have a program associated with it to create a file association in folder options." Have done that and still will not work. Any help will be appreciated.