I'm having Windows 8.1 ISO file. I also have 7.9GB USB. I wanted to find program which would help me install Windows next to Ubuntu to play games.
So I managed to use
UNetbootin but it didn't work. It booted and displayed "Default" as only menu. Whethever you did wait 10 seconds as it asked or you clicked on Enter, it just refreshed and restarted counting down.
Later I used:
root@Rik-PC:~# sudo dd if=/home/rik/Desktop/teddy.iso of=/dev/sdc | pv -s 20G, 0B/s for about 5 minutes, kinda disappointed me.
Do you maybe know another ways?