I was able to get rid of the "Duck". It was messing up some my sites that are relatively safe sites, causing freezing and not even allowing me to open some some other data on my desktop. Even though I may not have used all of the correct terminology when I initially posted, I believe I was expressing my self somewhat clearly. My latest concern is that when I am in Safari I used to click on the the tab under Safari and the first listing was "preferences." It is no longer there. In fact when I dropped down from the Apple logo I used to see a choice for preferences, but it is no longer there either. Maybe the programs have changed. But very often when I have been looking for an algorithm I would directed to go to preferences. What has changed.