Hi. I start using my laptop today and, although my screensaver is in the correct place (full screen), all my desktop icons have moved to the top of the screen (and above where I cannot access them) and open webpages to the bottom (there maybe others I cannot see to access). Even after logging off and on again it's the same. What can I do please? Using 10.7.5 on a 2007 MacBook Thanks.