HOW TO INSTALL WINDOWS 7 FROM USB

1. Create an ISO file from the Windows 7 DVD If you already know how to create ISO images,
   
    
2. Download the Windows 7 USB/DVD Download Tool from Microsoft. Once downloaded, execute the file and follow the installation wizard.
   
   
3. Start the Windows 7 USB DVD Download Tool program, which is probably located in your Start menu or on your Start screen, as well as on your Desktop.
    
4. On the Step 1 of 4: Choose ISO file screen, click Browse.
    
5. Locate, and then select, your Windows 7 ISO file. Then click Open.
   
   
6. Click Open.
    
7. Click Next once you're back on the Step 1 of 4 screen.
    
8. Click USB device on the Step 2 of 4: Choose media type screen.
    
9. On the Step 3 of 4: Insert USB device screen, choose the flash drive or external hard drive you want to put the Windows 7 installation files on.
   
    
10. Click the Begin copying button.
     
11. Click Erase USB Device if you're prompted to do so on a Not Enough Free Space window. Then click Yes to the confirmation in the next window.
    
    Note: If you don't see this it just means that the flash drive or external hard disk you've selected is already empty.
    
    Important: Any data you have on this USB drive will be erased as part of this process.
     
12. On Step 4 of 4: Creating bootable USB device, wait for the Windows 7 USB DVD Download Tool to format the USB drive and then copy the Windows 7 installation files to it from the ISO image you provided.
    
    You'll see a Status of Formatting for several seconds, followed by Copying files. This part might take as long as 30 minutes, maybe even longer, depending on which edition of Windows 7 the ISO file you have is from, as well as on how fast your computer, USB drive, and USB connection is.
    
    Tip: The percentage complete indicator may sit on one or more percentages for a long time. This does not mean anything is wrong.
     
13. The next screen you see should say Bootable USB device created successfully.
    
    You can now close the Windows 7 USB DVD Download Tool program. The USB drive can now be used to install Windows 7.
14. Change the BOOT settings. And set BOOT device priority to USB.
15. That's all