How do I remove a line of square dots

[Mkids]

There is a line of dots in my word document which I am not able to remove. I
have tried copying a text above this line (leaving the line) and pasting it
in a new document but the dotted line moves along with the copied text into
the new document. I am not sure how it came about but I think I typed about
10 asteriks and pressed the return key after which this screen wide line of
square dots emerged.

 

[Stefan Blom]

See http://word.mvps.org/faqs/formatting/CantGetRidOfLine.htm.