1. Open Command Prompt As Run as Administrator.
2. First type diskpart and press enter.It will open new cmd window.
3.Next type list disk command.It will list Disk number.In the below screenshot Disk 0 is hard disk and
Disk 1 is pen Drive.
4.Now type select disk 1 command in order to select your pen Drive(here Disk 1).
5. Now Type clean command in order to clean pen Drive.Here is the screen shot.
6. Now type create partition primary command to create primary part.
7. Now type select partition 1 command in order to select primary part.Here is the screen shot.
8. Now type active command in order to active selected part.
9. Now type format fs=fat32 command to assign format.It start formatting your pen Drive , and take few minutes so please wait to finish. Here is the screen shot.
10. Now type assign command.
11. At last type exit command. your pen Drive is ready to use.Use wherever you want to use like for installing Windows 7.
12. Copy all content of Windows 7 DVD folder (from your computer) and paste inside your bootable Pen Drive.
13. When the copy finishes, you are done. Use it to install Windows 7 in your computer/laptop or others.
Thanking you. see you in next tutorial.