I have Win7 Professional and am using Win Live Mail. I've downloaded and installed Open Office and MS power point viewer 2007. When receiving a .ppf file I click on it and it opens to the Media Center window. At that point I'm lost. To open the the pps file I drag the icon to the desktop. Then I 'X' out all windows - click on Start - All Programs then I click on MS power point viewer 2007 , click the saved pps icon on the desktop to open the pps slide show - works fine. When I used WinXP, I had a small program I would install after having downloaded and installeed PPViewer - I could then open the pps file from Outlook Express. Is there a similar file one can use to directly open a pps file in Windows Live Mail?