USB or Pen drive Bootable:
Step by Step Procedure
1: Connect your usb device to the computer. Go to command prompt icon.
2: Right click on the command prompt icon and select Run as administrator.
3: Command prompt administrator window will open.
4: Type DISKPART and click Enter.
5: Type listdisk and click Enter, you will see as below image your harddrive and usb.
6: Type select disk1 which is your usb device and click Enter, you will see as below image.
7: Type listdisk and click Enter, to check whether disk1 is selected or not by seeing * mark.
Now type clean to clean the usb drive.
8: Now type DISKPART> create partition primary and click Enter.
After that type select partition 1 and click Enter as seen below.
9: Now type DISKPART> format fs=ntfs quick and click Enter.
It will format the usb drive.
10: Type active and click Enter, to activate that usb device.
After that type assign to assign that drive as shown below.
11: Type exit and click Enter.
Now your device is clean and ready to make it bootable by copying the files or
iso image file of operating system(OS).
12: To make it bootable just copy the files or the ISO image file of the operating system which is available with you and now you can install the operating system with usb device.
Video on how to make USB or Pen Drive Bootable: