Windows 7 USB DVD download tool: “not a valid iso”

Microsoft released a USB DVD download tool that allows you to grab an ISO file from Microsoft’s own store and then put it onto a USB stick, but it won’t let you use a custom ISO file or it will simply give you the error message “selected file is not a valid ISO“.

Windows 7 USB Download Tool

According to, the Windows 7 USB download tool was using open source code and Microsoft had to remove it. By now, after some bug fixes the tool is available again as open-source.

Selected file is not a valid ISO file

You will receive the error “The selected file is not a valid ISO file. Please Select a valid ISO file and try again”, when you try to use a custom ISO file:
Windows 7 USB DVD download tool error: The selected file is not a valid ISO file

In order to use a custom ISO file, wrote a neat, handy tool that locates and copies the AVDP file of your ISO that is needed:

Download AVDP locator

Install Windows 7 without burning a DVD!

Ok, I am not saying that the Windows 7 USB DVD download tool is useless, but for most people it will be way easier to simply boot from the ISO file. There are many tools available that allow you to mount a virtual drive and boot from it.

So, if you are looking for a quick and easy way to install Windows 7 without actually burning a DVD, then read our tutorial:

How to install Windows 7 without burning a DVD

4 of 5 0 (80%) 4 votes
- Cheers!

Tags: , ,

Written by:
Oliver is the founder and lead editor of this site. He is interested in finding new ways to break Windows, find common errors and help others to fix them. Aside from that, he loves to fully customize systems with Rainmeter and Dreamscene, find out more about ancient civilizations like the Chachapoya, sharpen his digital photography skills and create software with a small group of selected developers. If you would like to connect with him to discuss anything, send him a mail!

Learn More About.Me

Follow me on Twitter for daily updates:

Contact The Author:

Get Free Help

Connect With Our Site:



Need help? Ask a question at our QA site, click the red button to get started:
Want to support us? Great, simply buy your favorite games from G2A via our referral link ( and save money at the same time:

13 Responses to Windows 7 USB DVD download tool: “not a valid iso”

  1. Orange Community Approved Comment:
    RvdH said:

    Duh! …it is made available for Microsoft store customers, customers would have a valid iso image.

    “When you purchase Windows 7 from Microsoft Store, you have the option to download an ISO file or compressed files. The Windows 7 USB/DVD Download tool allows you to create a copy of your Windows 7 ISO file on a USB flash drive or a DVD. To create a bootable DVD or USB flash drive, download the ISO file and then run the Windows 7 USB/DVD Download tool. Once this is done, you can install Windows 7 directly from the USB flash drive or DVD.”

    So obviously it won’t work on a customized/altered iso image

  2. Orange Community Approved Comment:
    sOliver said:

    “it is made available for Microsoft store customers, customers would have a valid iso image.”

    Yes, but let’s assume you are modifiyng your ISO to add the latest hotfixes and what not (there are plenty of reasons why you would use a custom ISO file) then you will need a workaround…

    .. and that’s where Rafael’s tool comes in handy!

    Of course there will be people who abuse it for pirated copies :(

  3. Orange Community Approved Comment:
    farhan ali raja said:

    Selected file is not a valid ISO file– Problem Solution (100 % Working)


    Open your iso file in poweriso(full version)
    Go to File–>File properties
    Check UDF
    Press ok
    Save your file
    Now use this tool!!

    Farhan Ali Raja

    from PAKISTAN

  4. Orange Community Approved Comment:
    blip blip said:


    Farhan Ali Raja’s solution works. For PowerIso 4.6, get the serial from :, don’t use any cracks or keygens as they could be A trojan.


  5. Orange Community Approved Comment:
    VladisLove said:

    Neeв help.

    Have a problem while burning USB flash…

    99% it tell me “we were unable to copy your files. Please chek chek your USB device and ISO file than try again ”
    i have tried so many times… but nothing changes it still goes ti 99% and stops… reason???

  6. Orange Community Approved Comment:
    David Riley said:

    I’m a student and downloaded a copy from msdnaa a d have an official iso and it doesn’t work for these files… how can I get it to work.

  7. Orange Community Approved Comment:
    sOliver said:

    David, what error message do you get? Also did you try the AVDP locator?

  8. Orange Community Approved Comment:
    Ced said:

    VladisLove, mine was stopping at 99% and same error message. But i tried to boot my netbook anyway, and it worked fine. So i guess u can discard this error message

  9. Orange Community Approved Comment:
    Na$h501 said:

    @ farhan ali raja

    Thanks it works for me 100% after i followed your instructions :)) muchas gracias mi amigo :D

  10. Orange Community Approved Comment:
    Akbar Ali said:

    @ Farhan it works for me too, Thx…UDF, Universal Disk Format to recognise a USB format ISO…Thank you Farhan Ali…

  11. Orange Community Approved Comment:
    PROTEOUS said:

    @ farhan ali raja
    Thank you very much.
    It is such a pleasure to find someone that speaks in a simple ,clear,concise,straight forward manner when passing on the solution to a problem.
    There is far to much Techno Geek Overspeak these days.If only everyone would keep things as easily understandable as you ,what a wonderfull world it would be.

  12. Orange Community Approved Comment:
    Galapagos said:

    It works Farhan! Was a great help. You did the trick!

  13. Orange Community Approved Comment:
    Dave Wolf said:

    In order for the Microsoft program to accept the ISO file, it *must* be encoded as a UDF ISO. Any ISO 9660 encoding will be rejected by the program.

Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>

Current day month ye@r *