Create Bootable USB or Pen Drive
Create Bootable USB or Pen Drive using Command Prompt (cmd)
Step 1:- Plugin your pen drive in pc or laptop USB port. after plugin open command prompt. Press Window Key and enter cmd or command prompt.
Step 2:- And cmd appears in the search result then Right Click on CMD and then click on RUN AS ADMINISTRATORS (if you have an open command prompt in administrators then your pen drive 100% bootable else some changes to creation time failed . So please open it admin if possible).

Step 3:- check it cmd open admin or not.

Step 4:- if you have open cmd in admin then next type diskpart and enter.

Step 5:- now enter diskpart command then type list disk.

Here it shows disk 0 and disk 1. And disk 0 is always your system hard disk please check the size of the disk carefully before selecting the disk.
Step 6:- now type select disk 1 (warning:- if you have plugin two pen drive then check is the size of the disk and select the pen drive that you have to create bootable ).

Step 7:- After selecting the disk part now type clean. after a clean command show message: DiskPart succeeded in cleaning the disk.

Step 8:- now type create partition primary press enter key. and then type select partition 1 press enter.
Step 9:- After selecting the partition 1 type active and press enter key.
Step 10:- After the active, the partition 1 type format fs=ntfs quick press enter .it will take some time one or more then one min it will depend on your system processor. after the successful message type exit press enter.