How to create win 7 bootable flashdisk

In earlier time, we often use the windows CD/DVD installation to install windows. How it can be done if the computer we want to install dont have a cd/dvd drive, for example netbook. The solution is install it using a flash disk.
In this post we will discuss about how to make a bootable Windows 7 flash natively, without using any additional software.
Below is the following steps :

1. Plug the flash disk into computer
2. Format your flash disk (don't forget to backup your data first)
3. Run command prompt by choose Start - All Programs - Accesories - Command Prompt. Right click and then "Run As Administrator".
4. Write "diskpart", we will enter in DISKPART mode
5. Type "list disk" to display all available disk in our computer
6. Write down these commands :
   

   select disk 1 
   clean
   create partition primary
   select partition 1
   active
   format fs=NTFS
   assign
   exit
   

7. Insert your Windows 7 DVD installation
8. Change command prompt to your DVD drive letter, for example in drive "d:"
9. Write this command to enter to folder boot "cd boot"
10. Write this command to make our flash disk bootable:
    

    bootsect /nt60 e:

    it is if our flash disk on drive e, for example. Change it as the environment of your system
    
11. close command prompt
12. copy all files in your DVD drive(d) to flashdisk drive (g)
13. Now your flashdisk is bootable as below

boot from flashdisk