Chip's PC is stuck in the boot cycle and eventually goes to a black/blue screen of death while updating Windows 10. Leo says he has a hunch that the hard drive is stuck and Windows can't find a particular file. If he can't go into safe mode, then the next option is to download a WINDOWS ISO and put it on USB with the installer (media creation tool). Then reinstall Windows from the USB key. But he can also run the recovery utility before reinstalling. If that doesn't work, the hard drive may be dead.