Samsung 2243QWX - Manual (Page 12)

You can see the deactivated monitor No.2 (this may appear activated). Monitor No.2 is
a virtual monitor which cannot actually be used. Therefore, first arrange the activated
monitors in the order which they are actually used and move monitor No.2 to the last
position.
Note
A virtual monitor may be not displayed in the 'Display Properties' window. Example)
Three or four monitors may be displayed in the 'Display Properties' window when two or
three monitors respectively are actually connected. In this case, the second one is a
virtual monitor.
Then click "OK" button.
Configuring the USB Monitor Display Information
1. When the driver setup for the USB monitor is finished, a monitor icon is created in the
system tray at the bottom of the monitor screen.
Connections