I have a new icon appearing on some programs in the top right corner of the screen.
It looks like the MS symbol, but is a black edge with a purple infil. It is perfectly rectangular in shape.
It seems to have soemthing to do with splitting screens.
I cannot quite rationalise if it is a creature of Windows 8.1 or my HP 23tm
It is quite irritating as it sometimes lingers in displays when pop ups have been dealt with.