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How To Clean Install Windows 10 From ISO File (Without USB/DVD)

Last Updated on November 28, 2019 by admin 8 Comments

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Windows operating system’s performance deteriorates with time. The best possible fix to make Windows fast again is to reinstall or perform a clean install of Windows 10 by deleting files, settings, and installed programs.

Traditionally, when it comes to installing or reinstalling Windows, users prepare a bootable media and then use it to install/reinstall Windows operating system.

To clean install or reinstall Windows 10, you don’t need to prepare a bootable USB of Windows 10. All you need is Windows 10 ISO, which you can get from Microsoft with the help of the official Media Creation Tool.

Install Windows 10 directly from ISO file

Well, it’s possible to clean install or reinstall Windows 10 from an ISO file. Clean installing Windows 10 from ISO is not vastly different from clean installing Windows 10 from USB or DVD. The only difference is that we are not going to create bootable media while installing Windows 10 directly from the ISO file.

What about the product key?

Note that you won’t need a product key if you have legally upgraded your current PC from Windows 7/8.1 to Windows 10 and successfully activated it, before clean installing Windows 10 on the same PC. Likewise, if you got Windows 10 preloaded on your PC and activate your copy of Windows 10, you have nothing to worry about.

When you are prompted to enter a product key during the product installation, click the Skip button. Your PC will be automatically activated after installing Windows 10 as long as you have installed the same edition of Windows 10 was activated on your current PC by using the free upgrade offer.

However, when you clean install Windows 10 on a different PC or newly built PC, you will have to enter a valid product key. 

If at all, Windows 10 is not activated after the clean install or reinstall, use the built-in activation troubleshooter to fix the issue.

Perform a clean install of Windows 10 from ISO image

Here is how to clean install Windows 10 from the ISO image file without having to create a bootable USB or DVD.

Step 1: If you haven’t downloaded your Windows 10 ISO yet, please follow the instructions in our download Windows 10 ISO from Microsoft guide to download the ISO image file.

Clean install from ISO Windows 10

Step 2: On your Windows 10 PC, where you want to perform a clean install of Windows 10, back up all data as we are going to clean install Windows 10 by removing installed programs and personal files. So it’s a good idea to backup everything using the right backup solution.

Step 3: Right-click on the Windows 10 ISO image file, and then click Mount option to mount the ISO image.

Clean install Windows 10 from ISO file step1

Step 4: Open up This PC, and then open up the newly mounted drive (containing Windows 10 installation files) by right-clicking on the drive and then clicking Open in new window option.

Clean install Windows 10 from ISO file step2

Step 5: Perform a double-click on the Setup.exe file to launch the Windows 10 Setup.

Step 6: When you see the following screen, select the first option labeled Download and install updates (recommended), or you can also choose the option titled Not right now, as we can always download and install updates after clean installing Windows 10.

Clean install Windows 10 from ISO file step3

If you have selected Download and install updates option, the setup will check for available updates and download them if available.

Step 7: Next is the user agreement screen where you need to click the Accept button to accept the license terms to install and use Windows 10.

Clean install Windows 10 from ISO file step4

Step 8: Once again, the setup might start looking for updates and download them.

Step 9: Once everything is ready, you will see Ready to install screen.

Step 10: Here, select Keep nothing if you want to perform a clean install of Windows 10 by removing all installed programs and data. We have chosen Keep personal files and apps as we don’t want to lose installed apps and important data.

Clean install Windows 10 from ISO file step5

And if you want to keep your data, please select Keep personal files option by clicking Change what to keep link.

Step 11: Finally, click the Install button to begin installing Windows 10.

Note that although the installation screen shows an “Upgrading” message, it’s actually clean installing. From here on, follow the straight-forward on-screen directions to complete installing or reinstalling Windows 10.

Filed Under: Windows 10 Tagged: ISO

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Comments

  1. Heinrich Winther says

    May 31, 2022 at 12:51 am

    Can I use the above if I am on Win 7 and wants to make a clean install of win 10?
    (I have the Win 10 ISO)

  2. Sammy says

    May 12, 2021 at 12:51 am

    Just click on setup. No need of power iso / daemon tools. Load it in the computer you have the hdd and I don’t think it will load from computer boot.

  3. Veema says

    January 12, 2021 at 10:02 pm

    After clicking setup, got message that ‘this app can’ t run on your pc’

  4. Vereda says

    November 29, 2020 at 3:20 pm

    My All-in-One PC had pre-installed Windows 10 Home, but I plan to install the Pro version [for which I have a legal and never used key], but when I start the process by reassembling the respective ISO, when I click on ‘setup’, only «Windows 10» appears in the header of the page where we have the option “Keep personal files and apps”.

  5. charlie says

    January 15, 2017 at 1:55 pm

    I don’t understand… This article does not describe how to boot the ISO image file! If I start installing Windows from an other Windows using PowerISO (or Deamon Tools) then how can I set the drive letter to install the Windows on? I want Windows to install on an other HDD…

  6. ankit says

    August 11, 2015 at 10:43 am

    hey can this be done in windows by power iso or daemon tools

  7. ankit says

    August 11, 2015 at 10:41 am

    Hey can we do this in windows 7 by power iso or daemon tool

  8. jennifer glen says

    August 2, 2015 at 3:57 am

    I am unhappy I had to revert back to windows 7 because my touchpad on my laptop wouldn’t work

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