Whenever I hit two keys simultaneously a blue square appears in the top left of my screen which has headings for 'Restore', 'Maximise', 'Minimise' and 'Close'. Nothing happems when I click on any of them and it is impossible to either carry on working or to get rid of this irritating square. It seems to happen whatever I am in at the time.
Does anyone know how to get rid of it without turning off my computer and rebooting?
I am on Windows Vista (yes, I know) and IE8.
“Every piece of music is a rehearsal of one’s life,” - Sir Colin Davis