how to make win10 and win8.1 OS bootable from a single pen drive. i got windows 10 aio. it contain x64 and x86 folder.
I use WiNToBootic, its as simple as it gets. You just drag your ISO over to it, and it does the rest. You can google it.
I created 2 vhd (booted via bcd) each have full installs of windows 8.1/10. Sitting on my external 250gb ssd. I used easybcd to prep/install bcd to usb and wintousb to install windows to the vhd image file. Works really well. ~mc
Once again thou...These all in ones won't work on a USB boot with UEFI GPT disk...which most computers have now because the install.wim has to be under the fat32 size of 4GB...They exceed that.
I had an 9+GB WIM from one of Murphy's AIO's on a USB drive All you need to do is to split the WIM file.