I had to open the case and plug the hard drive into the correct port to get it to work. I also had to insert a new video card but that was easy.  The onboard video card made everything yellow regardless of the monitor.The product was clean and works very fast. A beginner computer owner wouldn’t have liked this particular unit.  Hopefully they have good tech-support.  I, myself am very happy with it.  It was smaller than I thought.