First to know my windows 10 version was an upgrade from windows 7. Back in April 2018, I used an app (if I remember it was found in “Device performance & health”) in windows 10; that was supposed to check my programs that may not be compatible with windows 10 “ stupid me, I was curious ”. When the PC rebooted it was crashed. I tried to reinstall both 10 and my original 7 from install discs, but the PC said it could not find the hard drive.
This picture is what the PC boots to now! Please help.