Complex sentence: The Vista family of Microsoft Windows (Windows Vista, Windows 7) may have issues running DVDShrink due to changes to the graphics system; users will need to run the application under compatibility mode for Windows XP to avoid the application from hanging.
Split into simpler sentences: The Vista family of Microsoft Windows (Windows Vista, Windows 7) may have issues running DVDShrink. Users who experience difficulty may be able to run the application under compatibility mode for Windows XP to prevent the application from hanging.