I think you misunderstood what Ralstop 18 said. First, Windows 10 has done away with a lot of the .exe files (and even when they exsist, they don't open an app properly), instead they have app launchers. Find the search box either in the left side of the taskbar or right click the Windows symbol and click search. Type "Sticky Notes" in the "Type here to search" box. In the results you should see the Sticky Notes App. If you click on the long box the in the left panel, that says "Sticky Notes app" or the the square yellow box with a black frame that aslo says Sticky Notes" you will launch the Sticky Notes app. If you right click on either you will also be given the option to "Pin to Start" and "Pin to Taskbar" so you will be able to launch it again without having to search for it. It should also show up in the start programs menu under "S".