The only way to do this is to have installation files of Win10 and install.wim file of Win7. So, make a copy of these Win10 installation files and delete install.wim in "/x86/sources" and similarly delete for x64 in "/x64/sources". Now copy Win7's x86 and x64 install.wim in the "/x86/sources" and "/x64/sources" directories respectively. Finally, make ISO and/or bootable USB. Setup will resemble Win10 but will install Win7. NOTE: If you will install Win7 on UEFI-only PC (no support for legacy BIOS) it will hang at boot screen after first restart. It is because Win7 does not support UEFI-only PCs. So it will only support PCs with Legacy BIOS or UEFI+CSM (support for legacy enabled).
I already tried this possibilities. booting fine. boot menu for both architecture shows but when I choose for windows 7 (i tried windows 7 64 bits) but it gives me error. on my system there is UEFI+CSM.
May I ask what error are you seeing? Please mention the details and don't just say "there's an error".
@bodmas, Maybe this info can help to create your own for reference. Swedish guy generation2 already posted in torrent for Windows 7 dual boot x86+x64 en-US ISO on December 2015 (ISO name = W7.AIO.OEM.ESD.Dec2015.en-US.iso). He modified x86 and x64 folders for his own boot.wim and install.wim of Windows 7 respectively and replaced original x64 and x86 of Windows 7. For me, it was works for my i7-5820K (x99 chipset MB) and i7-4770K (Z87 chipset MB) UEFI/MBR. I hope after you done successfully for Win 7 MCT, please post how to. Thank you.
I've told him the same thing oldee. The thing is your machine supports UEFI/MBR (UEFI+CSM which supports legacy boot) and Win7 needs CSM support for booting on UEFI. On the other hand UEFI-only PCs don't have CSM (Compatibility Support Module) which helps booting legacy OSes such as Win7. bodmas must be doing something wrong as boot.wim is not needed to be modified, only install.wim has to be replaced.
Following the below solution I am able to run windows 7 installation for both architecture: Spoiler Boot x64 from your Win 7 AIO USB drive do NOT press continue press shift F10 next U:\x64\sources\setup.exe or, Boot x86 from your Win 7 AIO USB drive do NOT press continue press shift F10 next U:\x86\sources\setup.exe but this is not what I wanted, for what i wanted I think you mentioned the right guidance which I am reading and understanding and I will test it, re-test it and re-re-test it till the success end. thanks once again for the reference link.
@Mr.X, Nice findings... Did you proceed with the install on pure UEFI mode? I want to know does it hang after first restart (when all files are "expanded" and system reboots)?
Anyone willing to know bcd file editing, etc for this Win7 case can contact me via Skype just with one condition: gather and arrange all info and post it in this thread just like a guide for anyone. I feel really lazy to post in here all instructions.
Remember this video is about a Win7 x64 AIO without touching paths. Yes it works. This is not the first time I make and test an AIO of this nature.
So can someone place(post) the guide how to create that Windows 7 ISO AIO which should boot in full UEFI ?
I was just going to ask that, since my actual problem is to run Windows 7 Enterprise x64 on pure UEFI machine without no CSM features enabled, and since Mr.X posted the possibility with AIO image, I'm interested with that. And @Mr.X What could cause AIO image to run on pure UEFI ?
At present I do not have oure UEFI system so I am unable to test it but soon I will test it. In fact I have to understand the details of this UEFI system for pendrive. but if same is made iso using this command for UEFI and making DVD then it works on UEFI system. Code: oscdimg -bE:\win10\iso\efi\microsoft\boot\efisys.bin -pEF -m -n -lWIN10-PRO D:\win10\iso d:\Win10.iso