Window 10, MS Word 2010; when word is activated a small notice is placed on the top of the window. The notice is a small white box approximately 1” X ¼”, it has a blue W then a – then a □ then an X. When the W or the – is clicked the notice vanishes, when the box is clicked the Word document is displayed. When the document is displayed and the Restore down command (top right of the document screen) is clicked the document disappears. How do I fix this and return to normal?