How to boot and install windows 7 from USB Flash

Hello, in this tutorial I'm going to show you step by step how to format, create and copy windows 7 installation files onto usb flash storage and start installation windows 7 from usb.
Before starting, you must have Bootable Windows 7 DVD and USB Flash 4GB or higher. First thing you need to do is insert your Windows DVD into DVD Drive and your flash memory into usb port. Make sure all of them are worked!!

The picture above. My Windows DVD is in drive (H:) and my usb flash is in drive (I:)

If your flash contained some files, please format it. And start the steps below.

1. Click on Start Menu and type "cmd" in search box. Right click on cmd.exe and choose Run as administrator.

- A command prompt window appeared:

2. Type some commands (each command process by pressing Enter key):

diskpart

list disk : to view all available disk on my computer.

In the picture shown below. Disk 2 is my 4GB flash.

select disk 2 : I choose disk 2 for my operation.

clean : to clean my flash, wipe out all information on it.

create partition primary : create a partition of type primary.

format fs=fat32 quick : after create a partition, this command line will format my flash with the file system fat32 with the quick format method.

active : after formatted, I have to active my partition

exit : Exit Diskpart.

After active my partition I have to prepare my partition to be bootable, I need to run the bootsect command from dvd to my flash drive. Remember that, my DVD is in drive (H:) and my flash is in drive (I:). Type a command line below: