When trying to run a laptop from a bootable usb stick (with Ubuntu on it) stumbled at the error:
ERROR: No configuration file found
No DEFAULT or UI configuration directive found!
What I did try to fix the error (didn’t work for me):
* triple checking the BIOS options (booting from usb drives supported and activated… Saving… Choosing defaults and then saving… NOTHING.)
* typically I use only 1 usb flash as a bootable drive, and it usually works fine. Nevertheless, I used different other flash drives (all I had) to check if the problem was a faulty usb stick…
* rebooting, pressing F12, choosing booting from Usb drive… And getting the same error “No configuration file found”.
* renaming isolinux.bin and isolinux.cfg files to syslinux.bin and syslinux.cfg respectively.
* moving the syslinux folder into the boot folder (at the bootable drive).
What finally worked for me: (A VERY simple step indeed :)
Before making the bootable usb flash drive, I formatted the usb drive into FAT instead of FAT32. That’s all!
(ATTENTION: When making the bootable usb flash drive, do NOT choose formatting the drive by USB installer).
nor hard drive installed.