How to make a Bootable Pendrive?

method 1 : With ' Rufus' a window utlity software.

Rufus requires an account with admin access in order to make the necessary changes to hardware. After authenticating, insert the USB flash drive and launch Rufus. It will detect the drive almost immediately. Since Rufus can handle various partition schemes and file structures, ensure that the correct settings are set that match the UFD you're going to build (Figure A).
Click the optical drive button next to the Create a bootable disk using checkbox, and you'll be prompted to search for the ISO image to use (Figure B).
When using ISO images, Rufus will automatically modify the settings to best match it. Once everything is set correctly, click the Start button to begin the process. You'll be prompted with a warning that all data on the UFD will be destroyed. Click OK to proceed with the creation process (Figure C).
Depending on the ISO image size, the process may take several minutes to complete. For the log readout of each step in the process, click the Log button to open a side window and save the output details (Figure D).
The longest part of the entire process is the file copy portion. This is typically the last step and varies depending on file size/number of files to copy (Figure E).
When complete, double-check the external drive to verify the files were copied over (Figure F).
With the process completed, simply eject the UFD, insert it into the device you wish to install the OS on, and boot as you normally would. The days of carrying multiple CD/DVDs with you and dealing with lagging installs are drawing to a close with the ubiquitous use of USB drives—and the storage capacity can't be beat.

METHOD 2 : By CMD

Type ‘cmd’ in search window of start menu of your computer as shown below to open command prompt :
as shown in above screenshot , command prompt should be opened using “run as administrator”.
following window will appear :
now type “diskpart” in the command window and press enter , following window will appear :
then type “list disk” and press enter :
this command will list no of disks . the above picture is showing disk 0 which is hard disk of my computer . Now if pendrive is connected to the computer it will be listed as disk 1 .
in the next step select your pen drive using following command :
select disk 1
please be careful while excuting this command. There might be no of storage devices connected to your computer , select the appropriate disk no representing your pen drive , it may be disk 1 , or disk 2 , or disk 3 etc. you can recognize your pendrive by inspecting its size on size column. So command may be :
select disk 1 (or disk 2 , or disk 3 etc.)
After selecting your disk , run the following commands one by one :
- Clean
- Create partition primary
- Select partition 1
- Active
- Format fs=ntfs quick
- Assign
- Exit
Now pendrive is made bootable ,i.e.pendrive can be booted during startup of your computer and selecting the pendrive for boot in your BIOS setup or boot menu.