Have been using Windows 10 for about a week without any major issues. Today while in IE screen went black for a couple seconds, then returned to IE, but cursor didn't respond. Then screen went black and stayed black with "DVI", "HDMI", and "VGA" icons appearing sequentially in upper right hand corner, then "no signal". Large white cursor arrow on screen responding to mouse. CLT, ALT, Delete did not work. Manually powered down and repowered. Initial blue HP screen appears, but nothing further. I am a "basic" computer user, so simple directions would be much appreciated.