If you want to use your own Windows computer for surveillance, you will need a DVR card. Our DVR cards are PCI and PCI Express-based, and most of them only occupy one PCI slot on your motherboard. The software/drivers are on a CD which comes with every DVR card. The video cables from the cameras will connect to the back of the card and the included software will handle the viewing, recording, motion-detection recording, and remote internet viewing of your cameras. Make sure you have room to access your motherboard on your tower or desktop computer before your purchase a DVR card.