Do you have the Taskbar set to Automatically Hide? If so, try disabling it.
Try resetting the preferences file. Immediately after launching the program, press Alt+Shift+Ctrl. A message should pop up asking if you want to delete the Settings file. Answer OK.
Otherwise, try contacting Elements support. You can start a chat session by clicking on the blue Contact Us button under the Support menu at Adobe.com. Or you can contact Support by telephone using the numbers listed here: https://helpx.adobe.com/contact/phone.html.