Padlock icon appears - open and closed

  KNICK 10:35 14 Jan 2011
Locked

Hi, Recently a blue square with a padlock in it appears in the centre of my screen - alternating open and closed positions. I can click on it or move it and it is a great concern. Also a menu box keeps appearing with 'Dell Main Menu' as its title. I can't access this either to close or move. Can anyone explain or help please?
thanks very much

  Fruit Bat /\0/\ 10:37 14 Jan 2011
  woodchip 10:40 14 Jan 2011
  woodchip 10:42 14 Jan 2011

too slow

  KNICK 10:44 14 Jan 2011

No - so fast! thanks v much will give that a go.

  KNICK 09:43 21 Jan 2011

Alas, this fix has not worked - i've done it before and after and inbetween restarting. It doesn't always ask me to OK the change - perhaps this is the difference. Is there any hope at all or should I dump the monitor - it's too old for Dell to take any interest.
thanks

This thread is now locked and can not be replied to.

Elsewhere on IDG sites

Best phone camera 2017

Stunning new film posters by Hattie Stewart, Joe Cruz & more

iPad Pro 10.5in (2017) review

28 astuces pour profiter au mieux de votre iPhone