I followed the suggestion but unfortunately the task bar stayed put, even though it was shown to be unlocked. I used 'system restore' back to 2nd Jan. when I was sure the task bar was where I wanted it, and it worked. I should like to go back even more to correct size of the windows appearing on the screen, necessitating a shift to the right everytime I want to read the rest of sentences or click on something. That wasn't so back in the old year. The enlargement suddenly happened one day.
Is it OK to use 'system restore' again, or is this just a 'now and again' manoeuvre?