Make Bootable USB In CMD

Make Bootable USB of Windows 7/windows 8 by Command prompt 
                                                 (CMD) 

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Insert your Pen drive and press the start button.

Type cmd and right click on it and start this with administrator right.

Now on the command prompt, type the following commands

1. Diskpart

List disk command will generate the list of Disk connected to your computer like Hard disk and USB disk. This will be like in figure.
After this

2. Select disk 1 / in my case USB is as disk 1

3. Clean

4. Create partition primary
5. Active

6. Format fs=Ntfs quick / Format Filesystem=NTFS quick(don’t use Quick    for deep format, just use format fs=ntfs)

7. assign

8. exit

Now copy all the files of Bootable CD to pendrive.

Just reboot your computer, enter in BIOS setup and select boot device priority as

* USB

* HDD

* CD/DVD

* Network (Other)

And Tap [F10] to save and Exit.

 Enjoy.............