A friend's Win10 laptop stopped booting a couple of weeks after Windows updates were installed. Now it just keeps going to the "preparing automatic restore" screen, before failing. None of the advanced repair options are working. I created a installation usb stick and tried to do a repair using that, but that failed without even reaching the repair stage. So now I have the hard drive in a usb caddy and want to try repairing it while connected to my own Win10 pc. I've looked everywhere for a guide to do this, but I can't find anything other than sites which claim to repair broken installations with their own paid software. Is there anyway to do this other than a full reinstall?