Required:
Power ISO   Download from here
 &
 Windows 7 ISO file , 
Install and run Power ISO as administrator
Click “ Continued Unregistered” 
| Power ISO | 
Go to Tab “Tools “as shown in image
and Click on “Create Boot-able USB Drive”
and Click on “Create Boot-able USB Drive”
|  | 
| Power ISO | 
Choose Windows 7 Image file in “source image file”
And  USB Drive in
Destination USB Drive 
shown in image
shown in image
|  | 
| Add caption | 
And click on “Start “ 
After complete green belt to 100%
Remove Usb 
How To Install Windows From USB :
Insert  the USB 
And select  USB Drive
Option From BIOS Boot Option
on System Restart
on System Restart