I use my Dell Latitude 830 with Windows XP with my Epson 1825 to project PowerPoint presentations. I use a USB Type B cable to connect the two devices. The PowerPoint will flip from slide to slide with no problem on the laptop screen but there will be a delay when using the projector. The delay is even more pronounced when I try to project a AVI type video. Once again, the video plays fine on the laptop screen. Why is there a delay when using the projector? Is the computer lacking a video driver?