HOW TO MAKE "PENDRIVE BOOTABLE" USING SOME COMMANDS

Step-1
Open command promt and type "diskpart"

step-2
     "list disk"

step-3
     "select disk 1"   
NOTE:-Note: The set of commands assume that the Usb drive
         is addressed as “disk 1”. So double check that
        by doing a list by the command “list disk” before
        cleaning it.Now your Usb flash drive is ready to
        use for installation.

step-4
     "clean"

step-5
     "create partition primary"

step-6
     "select partition 1"

stpe-7
     "active"

step-8
     "format fs=ntfs quick"

step-9
     "assign"

NOw copy the all file of window 7 or extract 7 directly to the pendrive if it is in extension of .iso

 For Example:-