I run Dexpot in Administrator mode in Windows 8.1 64bit. I have four desktops and two monitors. I use the Windows Catalog to move between desktops or switch desktops. I'm talking about the full-screen view where all desktops appear at once, and the program windows are spread out so they don't overlap. Very often I find that some program windows have been duplicated and are appearing in multiple desktops. I can move a window to a desktop that it's already on, and this reduces the number of desktops it appears on. It's become a matching game that I play sometimes to find duplicates and try to reduce them to one desktop. I have two monitors, but the windows are only duplicated on their own monitor. Any help would be appreciated.