Mr.X,In addition...For your AIO Windows 8.1 or 10 I guess that the simplest way is to use the Media Creation Tool by choosing both architectures.Thus you have the base for starting windows in 32-bit or 64-bit, in Bios or UEFI.then replace:x86\sources\install.esd by your AIO install.wim with 32-bit home, Pro, enterprise,... imagesx64\sources\install.esd by your AIO install.wim with 64-bit home, Pro, enterprise,... imagesNot tested but it should be enough Oherwise, here is an example to change both bcd:Code: [Select]:: Change PATH:: MBR bcdBcdedit.exe /store PATH\boot\bcd /create {3de3efd5-a380-11e5-9c17-000000005aad} /d "Windows 10 Setup (32-bit)" /application osloaderBcdedit.exe /store PATH\boot\bcd /set {3de3efd5-a380-11e5-9c17-000000005aad} osdevice ramdisk=[boot]\x86\sources\boot.wim,{7619dcc8-fafe-11d9-b411-000476eba25f}Bcdedit.exe /store PATH\boot\bcd /set {3de3efd5-a380-11e5-9c17-000000005aad} device ramdisk=[boot]\x86\sources\boot.wim,{7619dcc8-fafe-11d9-b411-000476eba25f}Bcdedit.exe /store PATH\boot\bcd /set {3de3efd5-a380-11e5-9c17-000000005aad} path \windows\system32\boot\winload.exeBcdedit.exe /store PATH\boot\bcd /set {3de3efd5-a380-11e5-9c17-000000005aad} systemroot \WindowsBcdedit.exe /store PATH\boot\bcd /set {3de3efd5-a380-11e5-9c17-000000005aad} locale en-USBcdedit.exe /store PATH\boot\bcd /set {3de3efd5-a380-11e5-9c17-000000005aad} inherit {bootloadersettings}Bcdedit.exe /store PATH\boot\bcd /set {3de3efd5-a380-11e5-9c17-000000005aad} bootmenupolicy legacyBcdedit.exe /store PATH\boot\bcd /set {3de3efd5-a380-11e5-9c17-000000005aad} detecthal YesBcdedit.exe /store PATH\boot\bcd /set {3de3efd5-a380-11e5-9c17-000000005aad} winpe YesBcdedit.exe /store PATH\boot\bcd /set {3de3efd5-a380-11e5-9c17-000000005aad} EMS No:: displayorderBcdedit.exe /store PATH\boot\bcd /displayorder {default} {3de3efd5-a380-11e5-9c17-000000005aad}:::: EFI bcdBcdedit.exe /store PATH\efi\microsoft\boot\bcd /create {3de3efd5-a380-11e5-9c17-000000005aad} /d "Windows 10 Setup (32-bit)" /application osloaderBcdedit.exe /store PATH\efi\microsoft\boot\bcd /set {3de3efd5-a380-11e5-9c17-000000005aad} osdevice ramdisk=[boot]\x86\sources\boot.wim,{7619dcc8-fafe-11d9-b411-000476eba25f}Bcdedit.exe /store PATH\efi\microsoft\boot\bcd /set {3de3efd5-a380-11e5-9c17-000000005aad} device ramdisk=[boot]\x86\sources\boot.wim,{7619dcc8-fafe-11d9-b411-000476eba25f}Bcdedit.exe /store PATH\efi\microsoft\boot\bcd /set {3de3efd5-a380-11e5-9c17-000000005aad} path \windows\system32\boot\winload.efiBcdedit.exe /store PATH\efi\microsoft\boot\bcd /set {3de3efd5-a380-11e5-9c17-000000005aad} systemroot \WindowsBcdedit.exe /store PATH\efi\microsoft\boot\bcd /set {3de3efd5-a380-11e5-9c17-000000005aad} locale en-USBcdedit.exe /store PATH\efi\microsoft\boot\bcd /set {3de3efd5-a380-11e5-9c17-000000005aad} inherit {bootloadersettings}Bcdedit.exe /store PATH\efi\microsoft\boot\bcd /set {3de3efd5-a380-11e5-9c17-000000005aad} isolatedcontext YesBcdedit.exe /store PATH\efi\microsoft\boot\bcd /set {3de3efd5-a380-11e5-9c17-000000005aad} bootmenupolicy legacyBcdedit.exe /store PATH\efi\microsoft\boot\bcd /set {3de3efd5-a380-11e5-9c17-000000005aad} detecthal YesBcdedit.exe /store PATH\efi\microsoft\boot\bcd /set {3de3efd5-a380-11e5-9c17-000000005aad} winpe YesBcdedit.exe /store PATH\efi\microsoft\boot\bcd /set {3de3efd5-a380-11e5-9c17-000000005aad} EMS No:: displayorderBcdedit.exe /store PATH\efi\microsoft\boot\bcd /displayorder {default} {3de3efd5-a380-11e5-9c17-000000005aad}Just an example You can also use Visual BCD Editor or EasyBCD
I think it should be OK to prepare your USB sticks with Rufus, it must be FAT32 for UEFI.
I didn't know, what is the config to do for partition scheme and File System ?I just updated Rufus to version 2.5.799.0
Thanks I just look at the Faq, it seems that Rufus does not provide any option for dual UEFI+BIOS boot.https://github.com/pbatard/rufus/wiki/FAQ#Why_doesnt_Rufus_create_a_Windows_installation_USB_that_can_be_booted_in_both_BIOS_and_UEFI_mode
So, I do not know how it must be done, for the dual UEFI+BIOS option (Fat32) with install.wim larger than 4GB (Windows AIOs).Probably with a second partition NTFS and with an USB disk, not to switch between Hide/Unhide partition.
It all can be easily done - by NOT creating an AIO Install.wim over 4 GBTo create an AIO USB - use separate Folders..You can then capture the setup as an ISO file..As stated many times... Follow MS's Lead - it works..
So that part is already taken care of = We already have a bootable WinPESE..
yes it is possible.......with the dual boot setup (x64) (x86)right now the BCD points to the version in the respective foldersyou would have to edit the BCD to point to every version folder within the x64 x86 sub-folders(x64) windows 10, windows 8.1, windows 8.1 pro, windows 7(x86) windows 10, windows 8.1, windows 8.1 pro, windows 7if you notice the RAMDISK= options in the codeboxes I posted above - you will see that they all point to a different sub-folder
However I forgot to mention I want the AIOs separated by version, not all versions in one.