I have a Dell D520 Latitude laptop installed with windows 7 Enterprise to which i have connected a 20" dell monitor via the VGA cable. I can extend the displays to show only the laptop monitor or on the external monitor and duplicate, however what i would i cant do is show my main desktop page in the second external monitor and then extend the displays to show only the programs running in the background on my laptop display. Basically i want the bigger external monitor to be my main monitor and the laptop to be my secondary whilst the displays are extended. Can anyone help please!!!!!