We kept getting startup errors and Windows wouldn't start booting up. So we undid the big screw on the back of the housing, slid it off, and noticed that one of the cable ends for the hard drive cable had fallen out of the socket. We plugged it back in and then it began to work like a champ. We use the computer about daily for multiple Zoom meetings and it has proven reliable for the task.One note, when I opened the case I noticed that the computer worked off a platter hard drive. I'm sure I voided some warranty, but I replaced it with a solid state drive to make everything faster.