I assume PC starts, it just won't load windows?
is there anything on C drive you want to rescue? try making this on another PC: http://www.howtogeek.com/howto/windows-vista/use-ubuntu-live-cd-to-backup-files-from-your-dead-windows-computer/ (Can use a USB if you want to: https://tutorials.ubuntu.com/tutorial/tutorial-create-a-usb-stick-on-windows)
Also, on another PC, download the
Windows 10 media creation tool and use it to make a win 10 installer on USB
See if you can get into safe mode
boot from installer, on 2nd screen after languages, choose repair this pc, not install
choose troubleshoot
choose advanced
choose start up options
hit the restart button
choose a safe mode (it doesn't matter which) by using number associated with it.
Pc will restart and load safe mode
If it is corrupted files, we can try to fix them:
right click start button
choose powershell (admin)
type
SFC /scannow and press enter
once its completed, type this command into same window:
Repair-WindowsImage -Online -RestoreHealth and press enter
SFC fixes system files, DISM cleans image files, re run SFC if it failed to fix all files and restart PC
If Startup options isn't an option, try running system restore from the advanced menu
pick a date to roll system settings back to - hopefully a recent date.
PC will restart and roll system settings back, might fix the problem
If that doesn't help, I would do a reset
boot from installer, on 2nd screen after languages, choose repair this pc, not install
choose troubleshoot
choose reset this PC
2 choices, save files and settings or wipe it all. (Files = library folders. Library folders = Documents, pictures, movies, music (the default folders that come with windows). Settings = logins and desktop)
regardless of choice, PC will restart and reinstall win 10. You will need to reinstall all programs again. Reset only effects C drive so if you had 2 hdd, for example, it wouldn't touch the second drive or delete anything there.