Thanks for joining the community.
I see you have an Intel Pentium B940 and according to the specifications of the processor, this will support two displays. Since this is a laptop computer, it will handle built in LCD and an external monitor, total of 2 displays.
In other words, you would connect one VGA monitor and laptop screen, or HDMI monitor with built in LCD screen.
Please bear in mind the only way to reset video configuration would be uninstalling video drivers.
See here for more information about Multi-Monitor: