Create Windows 7 Bootable USB Drive From ISO File


This tutorial will help you with the installation of Windows from image (.iso and .img) file using USB Drive.

It is step by step method with pictures and screenshots. Without any CD/DVD. All you need is a USB flash drive of at least 4GB for Win 7 and 8GB for Windows 8 or 10.

This article is a detailed 100% Working Guide. It covers these topics:

⇒ How to Create Windows 7 Bootable USB Drive
⇒ How to Install Windows 7 from ISO File
⇒ Windows 7 USB Installation Guide
⇒ Install Windows 7 on USB

When you download Windows from Microsoft Store or any online source, you download it as an ISO file. An ISO file combines all the Windows installation files into a single uncompressed file – like a DVD clone or backup. With ISO file so you can create (burn) a bootable DVD or USB drive containing Windows installation files.

Create Windows 7 Bootable USB Drive From ISO File

This allows you to install new Windows OS onto your PC. If you change the boot order of drives in your PC’s BIOS, you can run the Windows installation directly from your DVD or USB drive when you first turn on your computer. You can search for information about how to change the boot order of drives in your PC BIOS.

Windows 7 USB Installation Guide

You need Windows image file + ISO to USB burner software + USB flash drive to create Windows 7 USB Install Disk.

Download Windows 7 Ultimate ISO File

If you don’t already have windows 7 image then you can get the ISO file from Windows 7 download page. The most popular edition is Windows 7 Ultimate ISO. Choose 32bit or 64bit version.

Download and Install Windows 7 USB/DVD tool

This is Microsoft’s genuine tool to make USB drive bootable. It can be downloaded here.

To install the Windows USB/DVD Tool, you must be an administrator on the computer on which you are installing the tool.

For 32bit Windows Users
Users who are running 32bit Windows need “bootsect” file to burn (copy) 64bit ISO file on USB drive successfully.

bootsect.exe must be present in the same folder as the .iso file. It can be downloaded here


Create Windows 7 Bootable USB Drive From ISO File

After you have downloaded above Windows 7 USB tool. Now Make a USB copy of your Windows ISO file, using this Tool.

Step 1 – Open this tool from your programs. e.g Start ⇒ All Programs. Click on Browse button and go to path where your windows iso file is located. Select Windows 7 ISO file and click Open.

Choose ISO File

browse windows 7 iso file to open

Step 2 – Click on USB Device as media type you would like to use to create windows 7 bootable USB drive.

Choose media type usb or dvd

Step 3 – From Drop Down box select your USB Pen drive letter e.g. H: or I: or G: and then click Begin copying. After the process is completed the USB is now bootable. Turn off your computer and plugin USB. Now Turn on PC and boot from USB. Done.

Insert USB device

When your Windows ISO file is copied, install Windows by moving to the root folder of your USB drive, and then double-click Setup.exe.

New Method 100% Working & Tested

Install the Rufus Software and Open it. It can be downloaded here.
After you open it. Follow Below Steps:

  • Plug in your Pen Drive into USB Flash Port.
  • To make a Windows bootdisk (Windows XP/7) select NTFS as file system from the drop down.
  • Then click on the buttons that looks like a DVD drive, that one near to the checkbox that says “Create bootable disk using:”
  • Choose the XP ISO file.
  • Click Start, Done!

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  • Download Link is live now. It is a safe file. Downloading bootsect.exe from other sources might harm your computer. Be careful.

    • Andrew Atchison

      I went from win 7 pro 32 bit to win 7 pro 64 bit lastnight without the bootsect.exe and the download worked and 64bit is now installed. Will i run into any issues for not installing with bootsect.exe?! I used a product key my preinstalled machine came with.

  • Connor

    When I Boot from the USB, It loads partway, then a blue screen, and an error message says bad_pool_ header. Any ideas?

  • Xy

    What is the use of Rufus?

  • sam

    this site is awesome i give 5/5

  • Alex

    When I double click setup.exe it shows this message: “That it is not find the point of entry of the procedure … bla bla”.

    Then when I click accept it shows: the file “autorun.dll” could not be loaded o is corrupt. Setup cannot continue. Error code is (0x7F).

    What do I do?


    hello mam i have installed windows 7 ultimate from u r site and i have installed in my pc.the problem is my ram goes to 100% without any application running

  • Hello Dina, then you can burn it on CD / DVD.

  • Christos Kalapothakos

    I have problem i made format my pc from rufus and selected from rufus ntfs and my pc has problem and i download iso windows 7 home premium 32 bit then i open rufus select fat32 (default) and then select iso file when i press start the message error say “The file system currently selected cannot be used with this type of iso. Please select a different system or use different iso” Any help?

  • Vralph Banghulot

    Do your win 7 downloads need a product key to activate , I’m using a laptop and I lost my product key, please reply immediately. thank you

    • Yes it require product key to activate, if you lost your product key then contact your vendor for help.

  • rajan

    my hp laptop on 32 bit .bt i chnge my 64 bit,,,help me

    • You need to change the hardware for this

      • Yamil Mohamed

        How to change hardware pls help me

  • Dipak ID Italiya

    i want to instal windows 7 on USB. can it is possible and how?
    And want to boot first USB and load OS.

    it can be possible ?

    • You can create a bootable Win 7 USB

  • richard

    when ever i try to run the installation, this message pops up
    “autorun.dll” could not be loaded or is corrupt. Setup cannot continue.
    Error code is (0x7F).
    what do i do?
    please reply me immediately.

    • Hmm i guess your image has been corrupted while creating the iso. Follow the above steps of the tutorial.

      • Gilbert Straight

        Don’t need it I use winrar to open it right way and install

  • Michell Tan

    Hi there, I am also using windows xp and i wanted to upgrade to windows 7. Did you use the first method? The first method is quite complicated as there’s many thing to download and i tried and decided to stop and use a better method. There’s a second method, did you see?
    If not, let me show you.

    -Install the Rufus Software and Open it. It can be downloaded here.
    -After you open it. Follow Below Steps:
    -Plug in your Pen Drive into USB Flash Port.
    -To make a Windows bootdisk (Windows XP/7) select NTFS as file system -from the drop down.
    -Then click on the buttons that looks like a DVD drive, that one near to the checkbox that says “Create bootable disk using:”
    -Choose the XP ISO file.
    -Click Start, Done!

    So if you never see it, look here. I am trying now so i am not sure whether it going to work but it is much more easier than the first method.

  • Ryan

    where is rufus software?

    • you can follow the tutorial to create bootable USB without Rufus software.

  • Semih Adilovci

    Hi there , i have an issue … Please help me . I did everything by your following steps and after i start to upgrade it , when i reach to 80% of Copying Files , it shows me an error that i have corrupted files ……. Error code : 0x80070241 . I have no idea what to do …

  • No name, and fake E mail

    Well, why dont you start downloading 32bit programs.. I mean, NO ONE can help you install 64bit programs on 32bit mashine. (32 is also sometimes refered as 86)

    • No

      Actually x86 is 64 bit and x64 is 32 bit.

      • X86 is 32Bit & X64 is 64Bit

      • Sagar Kumar

        Wrong ×86 is 32 bit and ×64 is 64 bit

  • Aakash Deep

    Hi, iam using windows pc can i install mac o.s on my pc .

  • Aakash Deep

    HI , iam using winodws 8.1 on my p.c can i install mac o.s on my windows p.c

    • Yes you can

      • Aakash Deep

        Thank you . But how can i get the ” mac ISO ” file o.s ,can you help me please

  • Benoit

    No way you guys are awesome ! Even if i am french i had understood all of the steps. So a real “Thank you” for this perfect guide. I’m finally running out of trubbles :D

  • Urdaddy

    The product key is not working:(

  • Vicky Sathya

    After running setup it is showing that searching for temporary files and then after an error of windows setup experienced an unexpected error. To install windows restart installation like its coming…..What can I do now….Pls help me

  • Micheal Alexanderaz

    SUPERB!!! all worked greatly good! thanks and i must admit this is microsoft tools more efficient than ISO maker, thanks for the great stuff, now i can re-install without goin to the computer store and waiting whole long day…