I'm using Windows 8 with PowerPoint 2013. I'm using Presenter View with 2 monitors and extended display. When I edit slides or do other tasks on my comoputer during a presentation, the windows task bar randomly will show up in the extended display so the audience can see it. It is very distracting. Clicking the Show/Hide Taskbar button has no effect.

Has anyone else had this happen or know how to fix it?