hello. i was just curious. sometimes on my desktop, in the top left hand corner of my screen there is a tiny white dot. it doesn't do anything that i can find, but whenever i hilite the icons on my desktop and click that dot, it's like i'm clicking on a window or something off of the desktop. and when i click back on the desktop again, the icons that i hilighted will light up and then go back to normal, as if that dot wasn't a part of the desktop. what is this thing?