So my son's computer ( A Dell Optiplex 780) will all of a sudden not load to windows. It's starts up, runs through the Dell logo screen and self tests and then hangs up on the next screen. I've hit F12 and run the diagnostics and the hardware passed which leads me to think it's a software problem. I'm not sure where to go with my troubleshooting from here. The system finds the HDD and tests it so I don't belive that's the issue.
Where should I go next? The computer is only about 4 months old, but we purchased it refurbished as a cheap birthday gift for my 12 year old.