Bootable WinPE USB Problem
I have an Acer S3-391 with the latest Win 8.1 Update. It is uefi/gpt and has secure boot disabled. Installed Aomei Standard Backupper 2.0.1 to try. First task was to create bootable winpe usb flash drive as I do not have a cd/dvd drive. Made ampe.iso. Used diskpart to prepare usb key and 7zip to extract the iso. Installed files on usb key. The USB is not recognized and does not boot. I know just enough to be dangerous, so I added bootmgr from a lazesoft iso that does boot my computer. Still does not boot in uefi mode. However, when I switched to legacy mode, I was able to boot from the modified AOMEI usb key. I tried backing up and restoring a single file and was successful.
Why does the unmodified AOMEI WinPe usb key fail. What can I do to fix it? I don't particulary want to change to legacy mode for backups, and I'm not even sure that backing up my system in legacy mode will really work. As I said, I know just enough to be dangerous, and am concerned that I don't really have a workable solution.