To make bootable the pen drive follow these steps
1.MakeBootable consists of a single executable file .
2.Run the MakeBootable executable file.
3.select the USB device you want to make bootable. Click on the "Make Bootable" button to begin the process.
Now you need to change the boot-up setting in the system BIOS.
Restart your system. Select USB Device as First Boot device in the boot device priority. If the boot-up files are created in the USB drive, select USB-HDD or USB-ZIP (preferred).
Once done, save and exit the BIOS setup. Now, you should be able to boot up with your USB device.