How to install Windows 7 From a USB flash Drive

Installing Windows 7 from a USB flash drive is a great way to install windows 7 into your system very fast. Just imagine small flash USB drive and its convenience over the bulky DVD. The main advantage of this process come when there are no DVD drives on the system that you are trying to install Windows 7 on. Most of the netbook and Laptops now a day exclude DVD drives because it consumes more power and increase the weight of the Laptop significantly.
In this post, I will show you how to make your USB drive bootable just like the DVD.

Things Required:
I. Minimum capacity of 4 GB USB flash drive.
II. Windows 7 installation DVD.

1. Plug-in your USB flash drive and make sure you have taken backup of datas in USB drive.
2. Open the command prompt with administrative previlage. Goto Start -> All Programs -> Accessories -> Right-click on “Command Prompt” and select “Run as Administrator”.
3. Once in command prompt, type this command:
DISKPART

This will start the Microsoft DiskPart.
Now, write this command on the prompt:
LIST DISK

This command will show the list of available disks on your system. Disk 0 is normally the hard disk. In my case, Disk 4 was the USB drive (please note that it can be different in your case). Now give following command:
SELECT DISK 4

Note that in the above command, 4 is the USB drive number on my system. In your case it might be different so replace this number accordingly.

4. Now type these commands one by one:
CLEAN

CREATE PARTITION PRIMARY

SELECT PARTITION 1

ACTIVE

FORMAT FS=NTFS QUICK

ASSIGN

EXIT

Minimize the command prompt and go to the next step.

5. Insert the Windows 7 installation disc and note down the “drive letter” of your DVD drive. In my computer, it is “G:”. Now type the following commands:
G: CD BOOT
CD BOOT
BOOTSECT.EXE /NT60 L:(NOTE: L: is your USB drive letter)
EXIT

You are almost done. Now, final step is to copy all installation files from Windows 7 DVD into the USB flash drive.
That’s it. Enjoy your bootable USB drive and let me know if you encounter any problem following these steps.
Final Note: Before you can install Windows 7 via USB drive make sure that your computer allows USB boot. In order to boot from USB drive you might have to change some BIOS setting of the computer where you intend to install Windows 7 via Flash drive.