Make a pendrive bootable for installing windows 7/vista without using software

Steps:
1: Format your pen drive in NTFS format.
2: Go to start and select command prompt.
3:Right click on it and select RUN AS ADMINISTRATOR
4:In the cmd type the folloying commands(Press enter key after each command)
       (a) DISKPART
       (b)LIST DISK
5: After typing list disk command you can see some list of disks. find  your pendrive's  number from this list.
6:Then type
(c)SELECT DISK N
Where N is your pendrive's number. Then type
(d)CLEAN
(e)CREATE PARTITION PRIMARY
(f)SELECT PARTITION 1
(g)ACTIVE
(h)FORMAT FS=NTFS (This will take some more time to complete)
(i)ASSIGN
(j)EXIT
suppose  H is your dvd drive letter and I is your pendrive then type
(k) H:CD BOOT(Where H is your dvd drive letter)
(l)CD BOOT
(m)BOOTSECT.EXE/NT60 I: (Here I is your pendrive)

Then copy the contents of the windows 7 dvd to pendrive.

Note:
(1)  After making your pendrive bootable then REBOOT your system. Go to your boot menu to check your boot priority, give first priority for flash/pendrive. Then save it.
(2)  This technique can be used to install windows vista also.

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