My advice Give up on Linux on a 3E. Secure boot keeps it from working. Since this is NOT a retail market device, it is very possible the Firmware will NEVER accept or run Linux. I officially give up as I may have bricked this 3E.. I tried to get into the UEFI settings through win8.1 and it locked up.. Could not shut it off..I may have to wait hours for the battery to drain.