I'm trying to put Ubuntu on my desktop. Right now, it and my laptop are running Manjaro 3.18. I've been using Unetbootin to create the live USB on my laptop. I've tried several different versions of Ubuntu, as well as a couple other distros. I've removed and reinstalled Unetbootin a few times as well. I've reformatted the USB drive each time between tries (FAT32 normally, but I tried ext4 once just to see if anything different would happen). I've used this USB drive many times before for this same purpose. No matter what I try, I get the error:
Failed to load ldlinux.c32
Boot Failed: Press a key to retry...
If there's any other information that would help, let me know.