it's quite obvious that x86 cpus cannot run x64 programs, x64 windows, or x64 PE's--this is simply understood by most people,
when it comes to PE, with regards to x64 windows, it DOES NOT mean you must use an x64 PE.
an x86 PE will work for imaging, editing, cleaning, installing, etc an x64 windows install. i know because i've been doing it for years and years and still do it to this day. even M$ suggests using an x86 PE for everything over x64.
where the limitations exist is only in HOW / WHERE you are booting your PE from on an x64 system.
if your pc is uefi and you don't want to boot csm, and it is running x64 uefi windows, then, if you want to boot PE from your hdd, this is the only time you MUST use an x64 PE image, because x64 uefi bootloader will not boot an x86 image from the hdd where the bcd menu boots windows--it will not work and always give an error.
if your pc is uefi and it is running x64 uefi windows, and you don't require running PE from hdd, then, you DON'T HAVE TO use an x64 PE image but instead you can boot an x86 PE from another device, such as a cd/dvd or usb drive--as long as the proper bios settings are activated to boot from these devices which will vary in every case but is ALWAYS possible if the hardware exists
if your pc is uefi, but you are running x64 windows through a csm configuration, then you can boot either an x86 or x64 image from your hdd--you DO NOT HAVE TO use an x64 image. in fact, if your x64 configuration is csm only, you can boot either x86 or x64 from hdd without error. in this case it does not matter either way.
i do all my recovery work from an x86 csm PE image of windows 10--i use it exclusively on both x64 and x86 systems and can do all the same tasks without limitations on devices with both uefi and csm configurations.
the reason i post this is because in five different threads so far in this section i've read posts by multiple members stating that an x64 system must use an x64 image which has never been true, and is ONLY true with regards to uefi windows and booting the pe from the same hdd as the windows install.
Edited by stayboogy, 11 May 2016 - 02:23 AM.