📎 AI Summary:
The original poster encountered a boot failure when trying to create a modified Windows 8 ISO, despite a working ISO without changes. A responder suggests updating tools compatible with Windows 8, noting differences from Windows 7, and highlights that Windows 8 discs may require specific boot files or commands, especially for UEFI booting, to ensure proper bootability in a virtual machine. Overall, the thread addresses troubleshooting boot issues related to ISO modifications and compatibility.
T

t1b4nhzw

New Member
Joined
Nov 18, 2015
Messages
1
Thread Author #1
I extracted a Windows_8 ISO and made some changes to ei.cfg. I recomposed the sources back to a bootable UDF ISO but this ISO fails to boot in a VM. I get a blank screen during boot.

Interestingly if I extract the same ISO and recompose it back again without doing any modifications then the ISO boots.
 

ussnorway

ussnorway

Windows Forum Team
Staff member
Joined
May 22, 2012
Messages
4,598
#2
I'd upgrade your tools, W8 is different to W7 and you can't use the same tools i.e, using windows 7 Upgrade tool will not work.

  • Also a tipical W8 disc has two boot files... the bootmgr or the efi...and a 32bit system may need the bootsect.exe file before you can install it on a 64bit vm.
Old boot format guide = UEFI Bootable USB Flash Drive - Create in Windows
 

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