My son was on the computer and when he left I have a window on my desktop that is active but I can't close it.He said he tried to make a shortcut of the window that is active but instead of a icon there it's open on the desktop.
I know it's something silly but I have not seen this before.

I got rid of it... You just had to move the window into the middle and close it... I still would like to know what it was. I rebooted the PC and it was still there. Like a live window that stays on your desktop??