How make pendrive bootable on windows7

NOTE :- When you go for pen drive bootable, at that time only pen drive use as single removable disk in your system

Firstly press WINDOW button and write in search box cmd, when cmd show in first line in searched then right click on that and "run as administrator", a pop-up window will be open, there are two options - yes and no, in this press 'Yes'.

Now command Prompt will be open in this follow some steps given below here :-

1. write "diskpart" and PRESS ENTER KEY
2. then next write "list disk" and PRESS ENTER KEY
3. now write "select disk 1" and PRESS ENTER KEY
4. now write "clean" and PRESS ENTER KEY
5. now write "create partition primary" and PRESS ENTER KEY
6. now write "select partition 1" and PRESS ENTER KEY
7. now write "active" and PRESS ENTER KEY
8. now write "format fs = ntfs" and PRESS ENTER KEY (if you want quick format then write (quick) after ntfs like this "format fs = ntfs (quick)" )
9. when format is completed then write "assign" and PRESS ENTER KEY
10. and finally write "exit" and PRESS ENTER KEY
11. now you come in cmd and write again "exit" and PRESS ENTER KEY

Now copy setup of windows 7 or windows 8 in your pen drive and boot your system and enjoy your new window.