I've got a XPSP3 System with integrated GPU (AMD 780G, ASUS M3A78-EM) with a (Dell) Monitor connected via DisplayPort.
A video beamer is connected to the DVI port of motherboard and nothing to HDMI and VGA.
"Dual Head" use basically works (extended Desktop) but, when I switch off the monitor, the desktop Icons and Taskbar get's moved to the beamer (even, when it is not powered!) or even to VGA (if the beamer it is not connected).
How to avoid this and force the desktop to stay on the displayport monitor?