INSTALL WINDOWS 7 OR VISTA USING BOOTABLE USB DISK.

Pen drive installation process for windows 7 is much faster than DVD/CD. There are some simple steps to make bootable pen drive which can be used for installing windows 7 in future as well. For this you need a pen drive having minimum space of 4 Gb and a Installation DVD of Windows 7.Now just follow this steps:-

1. First off all you need to format the USB drive / Pendrive:-
Run the command prompt as an Administrator
Now to find the drive number of your USB Drive, you need to type this and press enter every time.
diskpart

list disk
Here you can see the disk listed.Note down the disk number of your pendrive for the next step. Assume that the number is ‘A’.

Now type all these words to format the drive:

select disk A
clean
create partition primary
select partition A
active
format fs=NTFS
assign
exit
Now the disk partition program will exit and you’ll have a formatted USB flash drive ready to be made bootable.

2. Now to make the bootable pendrive, follow this steps:-
Now insert the Windows 7 Installation DVD and to your DVD drive.

Finally copy all the contents from the Windows 7 DVD to your Pendrive.

Here you have created the bootable pendrive. Now what you need is to make your BIOS to boot from USB.So foolow this steps:-
Insert your pendrive to the PC and reboot the system.

Now Enter the Bios system accordingly by pressing the key delete.This is where you’re on your own since every computer is different. Most BIOS’s allow you to hit a key at boot and select a boot option.

Now select the USB/ Pendrive as the first boot driver.

Now save the settings in Bios and restart and you will be able to Install Windows 7 using that pendrive