I apologize in advance, I haven't directly look at my friend's laptop yet just spoken to him over the phone. A friend was trying to upgrade his Windows 7 Pro laptop to Windows 10. He did it through Windows Update and said after about an hour after the install, the screen went black but the fans were still running. He left it on thinking maybe it was rebooting but it eventually powered off after another hour. When he turned it back on, he said he got the Windows 10 splash screen and then it said it was reverting back to an old configuration or something. After rebooting it launched the Startup Repair. I told him to just do a system restore but he said it shows no restore points. I am getting the laptop tonight to take a look but didn't know if there was anything you guys may know ahead of time. Thanks!
Use a common setting for the resolution like 1280x1024 as it sounds like his video driver is the issue.
go to the laptop website and download latest drivers before starting. While yo are there see if the have any Windows 10 drivers and save to USB.
I have been afraid to update my computers so far just because of these issues. build 1511 has reportedly been a problem.