Can you post a screenshot? Check whether the square is on a master page, and if it has a text wrap on it. Also check for unlock all on spread, and finally check for locked layers.
Thanks for the response. I researched and finally was playing around with the alt, shift and cntrl keys and I was able to select it and once I did that it deleted no problem. I have a 27 in monitor and the square was of dots about ½ by ½ inch. Thanks for your interest and enjoy the holidays. I will hold onto your email and if it happens again I will send you a screen capture.
All the Best,