I have obviously clicked on something without knowing but my screen has suddenly changed. Not sure I can describe this correctly but I can now see my screensaver behind the window I am viewing at the top and bottom as though the window has shrunk! I hope someone can help as it is very annoying. Thanks.
Thanks for trying to help Chuck but did the only thing I know how to do, a system restore to two days ago, and it seems to have worked. I really do wish I knew what I was doing??