After a major crash or system problem (e.g. system thread exception not handled), you will get the Windows 10 BSOD (Blue Screen of Death). See the example screenshots in:
If the disk is not too damaged, Windows will automatically reboot into the Windows Recovery Environment and display a Recovery screen (see screenshot of Solution 4) or Réparation Automatique screen.
Select Advanced options and then Troubleshoot (or Dépannage).
You can then choose between:
Follow the steps in Performing a push-button reset through Windows Recovery Environment
Note: if you have several disks and you get an error after choosing the option to remove the files from All Drives, try again and use the option to remove the files from Only the drive where Windows is installed
If you can perform the complete reset, you can go to the Basic Windows 10 installation
If the complete reset does not work, you will probably have to use an installation media to reinstall Windows 10