Get the recovery drive you made (if you did make one, everybody should) or your Windows 10 install disc (that came with the PC or that you made earlier), or make your own install disc or stick (with Microsofts MEDIA CREATION TOOL, google that). Then boot from it, and see if any repair works before you start with refresh or reset.
See, for example,
Or use the maker prescribed way to go back to factory conditions.
My PC starts to flicker in the beginning when I boot and later gets stuck at "Preparing Automatic Repair" and does not go further or even load anything. Help!!!!!!