I am going to assume that I have two defective flashes. The spreadsheets work OK on the flashes but will not load Linux. Have tried to load through F2 and F12. Have tried 2 computers, ME and W7. Have cleaned,partition, and formatted the drives.
In this case our recommendation is for you to contact the computer manufacturer for assistance on the BIOS they included with their system.
You may create a bootable flash drive and tested in a different system. Once you know it works, you may test it with the DELL system properly setup.