Topic: Extracted UEFI Boot Image UEFI capable?
started by: Saltgrass
Posted by Saltgrass on Nov. 06 2012,10:46Since the newest version of UltraISO supports UEFI, I was wondering what the difference is between using an extracted boot image from a UEFI DVD or Opening the DVD, adding files and then making the .iso.
It seems I got the Opened version to boot correctly, but the .iso made with an extracted image would not. There may be some settings I have not yet found or have set incorrectly, so any guidance would be appreciated.
Edit: I just ran another test using the extracted boot image and it seemed to work. Now, if Microsoft doesn't get the problem with making the Windows 8 Upgrade .iso from the Upgrade Advisor/Installer fixed, I have another option.
Posted by Saltgrass on Nov. 07 2012,22:56I think I may have spoken too soon. I have again tried to make a DVD UEFI bootable using a .bif file.
I can edit a known good boot .iso and add files to it and it boots correctly, I just cannot use the .bif file to make a new .iso bootable from scratch.
I add the .bif file and the .iso shows as being bootable UDF, but it does not show the UEFI as a boot option. What am I missing?
Edit: Well again, I may have it. It seems using the efisys.bin file as a boot image works.