how do i get 2 screens to work on an hp pavillion 400-314 with the built in vga and dvi-d

How do I get 2nd monitor working using DVI-D port on an HP Pavillion 400-314 desktop.  VGA works, 2nd monitor does not work using an adaptor for the DVI-D to VGA.  Win 8.1 64 bit  no place for add on cards.  built in jacks only