I want to form my USB pen ,a bootable device?
Answer:
The previous answer was correct as far as how to manufacture your USB the drive that gets booted first. However, your quiz regarding software make me think that even if you do this, within is nothing on the drive for the system to boot.
What you have need of is not merely for the system to access the USB drive but for an operating system to be stored on the USB drive. The one system that is designed for this is Linux. You will want to copy a bootable distribution of Linux to your USB drive. Then when your PC access the drive, it will boot up that operating system instead of the system which is located on your C: drive. IBM has an article which discusses this below.
Make sure the information you have need of is on your USB drive (not hidden surrounded by any folders, but placed in pane you get if you double click on the USB drive contained by My Computer.) Now eject the USB drive.
Restart your computer. While it's booting (before the Windows screen) the screen will be black and a message will be displayed on the bottom of the eyeshade telling you how to access the BIOS of the computer (usually F2, F5, F8, or F10)
In this DOS menu, arrow right until you procure to the boot order, move USB up on the boot menu. Exit and amass changes. Turn the computer sour. Plug the USB drive in. Turn the computer on.
When you're done, use equal method to return the computer to it's original state.
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