This past weekend I noticed that I am unable to view my reminder's window in Outlook 2013. It displays as usual minimized at the bottom of the screen. But, when I select it to view, nothing happens. It is not in the background either. If I minimize everything and select this window from the bottom, nothing happens. I can only view it in the small, minimized state at the bottom. I don't know what happened to cause this behavior, but how do I fix this? I tried closing and reopening Outlook, rebooting, restoring to a previous restore point. Nothing fixes this.