I see, thanks. My install image Is a bootable USB-flash disk which was built by a corporate IT department. On that flash disk the only files in \Boot are BCD, bcd.LOG, bcd.LOG2,, boot.sdi, bootfix.bin, bootsect.exe and memtest.exe. That USB flash-disk install image is the one I used originally to install, and now I need to "Refresh", so I wanted to use it as the basis for the Refresh as well. Unfortunately, there seems to be some bug in Win8 Refresh -- the code will only accept a DVD installation disk (and not a USB stick) as the source of missing files. So I'm trying to generate a bootable DVD installer from the bootable usb stick I have. If the directory structure of this apparently non-standard install image is of any interest, let me know and I'll mail you the output of dir /s (or anything else you need). (I'm not sure I'm allowed to attach the full directory listing in a public forum for confidentiality reasons, and besides, I don't see how to attach a file to this post). Anyway, thanks. I guess I'll have to use the USB disk I have and try an upgrade-install with retaining-settings.