I wanted to format my w7 drive and install Ubuntu, so I have made an Ubuntu 14. 04 bootable USB, but when I try to boot from that USB it gives this message:
Attempting boot from USB
Normally it should boot after this message, but it does not go any further.
I also have made a Lubuntu 14.04 bootable USB after that, which did not boot same as Ubuntu 14. 04.
There is no problem with USB disk, since the same USB disk can boot with w7 installation.