Technology in terms you understand. Sign up for the Confident Computing newsletter for weekly solutions to make your life easier. Click here and get The Ask Leo! Guide to Staying Safe on the Internet — FREE Edition as my thank you for subscribing!

How Do I Create a Bootable USB Thumb Drive from an ISO?

ISO files are disk images often used to distribute software. In years past, we burned them to CDs. As the ISOs themselves became larger, we’d burn them to DVDs instead. In either case, we would then boot from the CD or DVD to run whatever the software provided. A good example might be operating system installation DVDs.

More and more machines are coming without optical drives — that is, they don’t have the ability to read a CD or DVD, much less boot from it.

Fortunately, there are tools we can use to take an ISO that contains a bootable image and place it on a USB thumb drive from which you can boot.

Become a Patron of Ask Leo! and go ad-free!


There are actually several tools, but one I’ve run across that seems to do the job simply and well is called Rufus.


Download and run Rufus directly from the Rufus website.

Rufus Main Window

Under “Device”, select the USB thumb drive you want used. If none appear, make sure you’ve inserted one and Windows recognizes its presence.

Under “Boot selection”, use the Select button to locate the .iso file you want to copy to this USB thumb drive.

In the example below, I’ve inserted an unlabeled USB thumb drive that appears as “E:”, and I’ve selected the file HBCD_PE_x64.iso (the most recent Hiren’s Boot CD), that I’d downloaded previously.

Rufus Selections

That’s all I needed to do. Click Start to begin the process.

You’ll get a warning.

Rufus Warning

This operation erases everything that’s currently on the USB flash drive and replaces it with the contents of the ISO. Make sure that’s what you want to do and click OK.

Exactly how long this takes will vary depending on the size of the ISO you’re writing, the speed of your hard disk, the speed of your flash drive, and whether you’re using a USB 2 or 3 interface.

After all is said and done, you have a bootable USB flash drive.

Hiren's Boot CD

Do this

Subscribe to Confident Computing! Less frustration and more confidence, solutions, answers, and tips in your inbox every week.

I'll see you there!

Podcast audio


Video Narration

16 comments on “How Do I Create a Bootable USB Thumb Drive from an ISO?”

  1. Leo strikes again: right on point! Just what I’ve been looking for. Hence: Thank you Leo.

    No wonder I’ve been following Leo for at least a decade. Remember Buy Me A Latte? Buy Me a Beer? Never did, but bought some excallent books…

  2. You did not mention it the article but don’t you first have to check the BIOS to ensure that the USB drive is earlier in the sequence than the hard disk, so that the system will boot from your USB drive before booting from the internal hard drive?

  3. Hello!
    Thanks for the article, however, I can’t it to boot from the flash drive. I’ve done it as Fat32 and NTFS, and I changed the BIOS to boot from it. I’ve used Rufus to recreate the bootable drive like four times and I can’t get it to work. When I boot from the flash drive, it pulls up a screen with weird pixcelated lines at the top and middle that look like maybe the outlines of what the page is supposed to look like, but no words or anything else. No matter what I press, it just goes back to loading Windows normally….

    Please help!

    • Not sure what to tell you. Booting from USB can be tricky, but it is different for every machine. I’d have you reach out to the support offered by your computer’s manufacturer to see if they can help.

  4. What if I didn’t have a Thumb Drive either?
    Can I run the ISO file from the Hard Drive directly?
    Or is there a program that can allow you to boot any ISO file in your Hard Drive?


Leave a reply:

Before commenting please:

  • Read the article.
  • Comment on the article.
  • No personal information.
  • No spam.

Comments violating those rules will be removed. Comments that don't add value will be removed, including off-topic or content-free comments, or comments that look even a little bit like spam. All comments containing links and certain keywords will be moderated before publication.

I want comments to be valuable for everyone, including those who come later and take the time to read.