Hi, I have a solution for not one, but TWO problems associated with this outdated, but nevertheless unsurpassed program. These tips apply to Windows 10 (which you should use for many reasons from functionality to security)

1. Installation:
   Use google to find and download a setup file with the correct language version. The language has to correspond with your windows language and/or regional settings.
   
2. Operational problems:
   If some images don't want to open due to "memory" problems and if they don't show full screen in presentation mode, do the following:
   • Right click shortcut icon,
   • select properties
   • select compatibility tab.
   • Press Change high DPI settings button. 
   • tick both boxes
   • close windows with OK

Everything should run smoothly now