How To Make A Pendrive Bootable Using CMD

Click Start -> All Programs -> Accessories and right-click on Command Prompt. Select Run As Administrator. Of course, you need to be able to authenticate as the administrator on the PC you’re using.
For Windows 8/8.1/10 alternative shortcut to access cmd as admin is to simply press windows key + x and it will pop up a menu in the left side of the screen and you can access run as administrator from there.

Partitioning The Disk

1

TYPE :  DISKPART

This will open ups the Partitioning Application >

2

TYPE :  LIST DISK

Figure out which of the drives listed is your USB drive, and note the number. It’s crucial you get this right, or you’re going to end up losing data on other drives.

Now type the following series of commands below :

Let me clarify you > Here, my disk is number '1".means that is my pendrive and Disk '0" means my Hard Drive .Don’t confuse this with PARTITION 1. That number does not change, even if your disk is 3. So use only one usb at a time to avoid confusion.

3

SELECT DISK 1

CLEAN

CREATE PARTITION PRIMARY

SELECT PARTITION 1

ACTIVE

FORMAT FS=NTFS 

( Here you have to wait for nearly 30 mins to complete upto 100% and then only enter the below commands )

ASSIGN

EXIT

4

MAKE IT BOOTABLE :

When you’re done, put in your installation DVD if you haven’t already. Note down which drive letter your USB disk and Windows installation DVD are located at.

Go back to you command prompt box and type assuming letter  "D"  is your DVD Drive  and example "X" is your USB Drive.

5

 TYPE >       D:/BOOT/BOOTSECT.EXE /NT60 X:

This will basically make your USB drive bootable.

6

COPY EVERYTHING 

The final step can be done from My Computer. Just open up the installation DVD highlight everything and drag it to your USB Drive.

Now you should be all set – just insert the USB disk into your new PC, and enter the BIOS to adjust the boot order, or choose the option during start up which says Choose Boot Device.