I created a live USB according to this instructioins http://docs.kali.org/downloading/kali-linux-live-usb-install.I run the dd command on a Ubuntu 15.04 machine to create the live USB.The operatioon seemed to have finished successful but when restarting and selecting the USB from the boot menu, the boot menu disappears for a second and then comes back again!?I have a USB CD entry and a USB HDD entry, but both, when selecting, the menu disappears and appears shortly after again...On the machine I am trying to install Kali, I have also installed W7 and Ubuntu 15.04 which I also performed with a Live USB!the content after running the dd command of the upper folder is total 584-r--r--r-- 1 dan dan     25 Mar 12 18:51 autorun.infdr-xr-xr-x 1 dan dan   2048 Mar 12 18:52 bootlr-xr-xr-x 1 dan dan      1 Mar 12 18:35 debian -> .dr-xr-xr-x 1 dan dan   2048 Mar 12 18:35 distsdr-xr-xr-x 1 dan dan   8192 Mar 12 18:34 firmware-r--r--r-- 1 dan dan 159564 Mar 12 18:51 g2ldr-r--r--r-- 1 dan dan   8192 Mar 12 18:51 g2ldr.mbrdr-xr-xr-x 1 dan dan   2048 Mar 12 18:51 installdr-xr-xr-x 1 dan dan   2048 Mar 12 18:51 isolinuxdr-xr-xr-x 1 dan dan   2048 Mar 12 18:50 live-r--r--r-- 1 dan dan  39734 Mar 12 18:52 md5sum.txtdr-xr-xr-x 1 dan dan   2048 Mar 12 18:34 pool-r--r--r-- 1 dan dan 366293 Mar 12 18:51 setup.exedr-xr-xr-x 1 dan dan   2048 Mar 12 18:51 tools-r--r--r-- 1 dan dan    228 Mar 12 18:51 win32-loader.iniand the content of the boot folder  efi.imgLet me know if you need any further information
Live USB with Kali not booting
usb;kali linux