after do a lot of reading of review and research for usb video card adapter I learn about some of the limitation of video as well as the limitation on Windows Vista . have accept these limitation and make my purchase I can now report back that I be very happy with my purchase . I run three monitor now with the addition of the one usb to vga adaptor from startech . pro - Easy to install . just software install from disk plus connect the monitor . Quality of image show as good as my other monitor run on the same computer . extra monitor possible without change video card !!! -lrb- most obvious -rrb- Works with Windows Vista . con - slight delay noticeable when drag item across screen . large resolution play with either a delay or show less frame , but smaller video frame size seem to play ok . ca not use window vista `` aero '' theme but its not a significant difference in my case . I would recommend anyone look for to add a extra monitor to look at they computer specification and understand they need . as long as the additional monitor will not be the primary monitor for the user , I would believe that most people will be happy with this item . especially happy will be those who be run Windows Vista because not all usb to vga adapter support driver for vista .