The AC adapter that came with this did not work. I had to buy one ($77). Two weeks later, the HP mini wouldn't power on and I had to go down the rabbit hole with IT. They have to send a technician out to replace the system board. Judging by other customer reviews, this is a common problem. When this PC works, it's great. But so far it's been more trouble than it's worth. Make sure the one you buy is still under warranty.