Thank you Mabaega I will look at this. But I have an ISO that when burnt to a DVD, it boot just fine in UEFI. When I change the ei.cfg file for my needs and burn again, it will not boot !! I don´t understand why changing the ei.cfg file interrupts with the possibility to boot in UEFI Bios.
Because if you extract the bootable ISO, it will lose the "ability to boot".. To bring it back, just follow @mabaega's post...
How do you modify the ISO file? I guess you are using an ISO image tool that cannot correctly handle multi-boot entry to replace the ei.cfg file in ISO. If you are using such tools, don't use them and recompile ISO from modified source tree as mabaega said.
...what they've already mentioned about using oscdimg. You need the -bootdata #pEF part or a combo of -b pointing at efisys.bin and -pEF Most ISO programs cannot maintain the correct boot data to boot both uefi and bios booting. I could only speculate as to why this is... Perhaps it is using pointers to boot sections instead of a single boot sector. I have no idea. There are some adk tools links around the forum. You can use the search function to find the WAIK 5.1 tools, which are the most recent.
you have to use poweriso or ultraiso to easily modify iso and save as another make sure it reads the UDF volume
CD's and DVD's are dead. It's year 2014! I'm installing Windows 8.1 from USB. 1.) mount image to virtual drive 2.) open prompt as admin Code: diskpart list disk select disk # (replace # with the number of the usb disk) clean convert gpt create partition primary select partition 1 format quick fs=fat32 LABEL="EFI-instal" assign letter="W" list disk list volume exit xcopy x:\*.* /s/e/f w: X= DVD with mounted image, W = USB Now, you can change ei.cfg, insert pid.txt etc... //edit: install Windows 8/8.1/8.1 with Update from BIOS
Good morning to you all from Denmark. This might be the problem, I don´t know,maybe Mabaega have an idea. Jan Cerny - I don´t need any keys for activation, I use legit keys. I just like to have an untouched ISO an try to set them up to my needs for installation on many different computers. Also I know that the ei.cfg file works just fine (mabye not with the code for UEFI/GBT) and then I also do not need the General product Keys to install.
VLK iso ([Channel] Volume, [VL] 1) is bad choice. I recommend to use oem/retial (I'm not sure) iso marked as "multiple edition" like da_windows_8.1_with_update_x64_dvd_4048105.iso
Thanks to you all for your help. I finally figured it out, I made a stupid mistake over and over again What you need to do is simply to change the ei.cfg file before you create the iso with oscdimg. If you create an USB install with Rufus, you can change the ei.cfg file at any time as you like. Jan Cerny, it works just fine with both downloads da_windows_8_1_pro_vl_x64_dvd_2971937.iso da_windows_8.1_with_update_x64_dvd_4048105.iso all you need is making the ei.cfg file to your personal needs and if you create one like this it also give the choice to install either Pro or Core [EditionID] [Channel] OEM [VL] 0
this works with USB HD only or Microsoft Certified flash drive due to the fact flash drive partitioning is not supported
this works with USB HD only or Microsoft Certified flash drive due to the fact flash drive partitioning is not supported
I´m not sure what you mean by this, but I can confirm that the commands for disk part provided by Jan Cerny work just fine on an ordinary USB stick. It is tested Update for diskpart command see post #20 diskpart list disk select disk # (replace # with the number of the usb disk) clean convert gpt create partition primary select partition 1 format quick fs=fat32 LABEL="EFI-instal" assign letter="W" list disk list volume exit xcopy x:\*.* /s/e/f w: X= DVD with mounted image, W = USB _________________________________________ _________________________________________ x:\*.* can be changed to the path of your files from an unpacked iso file !!!remember the 3 spaces. After xcopy and *.* and /f My command looked like this: xcopy E:\Win8.1test /s/e/f w:
Yes the above diskpart commands will work with any USB key. Get rid of "convert gpt". It's not gpt. UEFI requires Fat32 which your formatting the key as already. Also, if you make it "active", you'll be able to boot both UEFI & Legacy/BIOS...
Your thinking of "Windows To Go Keys". That only applies if your trying to make multiple partitions. In this case it's only 1 fat32 primary partition...
diskpart list disk select disk # (replace # with the number of the usb disk) clean create partition primary select partition 1 format quick fs=fat32 LABEL="EFI-instal" (can be replaced with"whatever") Active assign letter="W" list disk list volume exit xcopy x:\*.* /s/e/f w: X= Drive letter, *.*= all files(change to name of folder) W = USB x:\*.* can be changed to the path of your files from an unpacked iso file !!!remember the 3 spaces. After xcopy and *.* and /f My command looked like this: xcopy E:\Win8.1test /s/e/f w: This is now tested and it boots in both Legacy and Uefi.