How to Create a Bootable Disc from an ISO File
An ISO file is a complete disc image saved as a single file on your computer. To use it — whether it is Windows, Linux, a recovery tool, or any other bootable software — you need to burn it correctly to a DVD or USB drive. This guide shows you exactly how, step by step, using completely free tools.
Most people download an ISO file and then wonder why double-clicking it does not install anything. An ISO is not a normal file you just run — it is a disc image that needs to be written to a bootable DVD or USB drive in a specific way before your computer can use it. This guide explains what that means, which free tools do it best, and the exact steps for both DVD and USB — for Windows, Linux, and recovery tools.
What Is an ISO File?
An ISO file (also called a disc image) is an exact copy of an entire DVD, CD, or Blu-ray disc stored as a single file. The name comes from the ISO 9660 filesystem standard used by optical discs. When software developers release an operating system like Windows or a Linux distribution, they package the entire installation into one ISO file that anyone can download.
The important thing to understand is that you cannot install an ISO file by double-clicking it like a normal program installer. The ISO needs to be properly written to a physical disc or USB drive so it's bootable — meaning your computer can start up directly from it before the operating system loads. This process is called “burning an ISO” for DVDs or “flashing an ISO” for USB drives.
Never copy the ISO file onto a USB drive using Windows Explorer or drag-and-drop. Copying the ISO file itself does NOT make the USB bootable. You must use a dedicated tool such as Rufus, Balena Etcher, or ImgBurn to properly write the disc image to your USB drive or DVD. Only then will it boot correctly.
Best Free Tools to Burn ISO in 2026
These are the four most trusted and completely free tools for creating bootable discs and drives from ISO files:
The most popular free tool for creating bootable USB drives from ISO files. Incredibly fast, simple one-window interface, and supports every major ISO format including Windows 10, Windows 11, Linux, and more. The first tool every tech person installs.
The simplest ISO-to-USB tool available. Three steps: select ISO, select USB drive, click Flash. Beautifully designed, almost impossible to make a mistake, and available for Windows, Mac, and Linux. Perfect for beginners.
The most complete free DVD and CD burning tool available. Burns ISO files to DVD, CD, and Blu-ray perfectly. Also verifies the burn after completion to confirm the disc is error-free. The go-to tool for disc burning since 2006.
Windows 7 and later include a built-in ISO burning feature for DVDs. Right-click any ISO file and select “Burn disc image.” Simple and reliable for basic DVD burning with no extra software required. Does not support USB bootable creation.
Method 1: How to Burn ISO to DVD
The easiest way to burn an ISO to DVD on Windows requires no extra software at all. Here is the complete process:
Insert a blank DVD into your DVD drive
Use a blank DVD-R or DVD+R disc. For most ISO files, a single-layer 4.7 GB disc is sufficient. For large ISO files over 4.5 GB, you need a dual-layer DVD-R DL disc. Make sure the disc is completely blank — used or partially written discs will not work. Close any pop-up window that appears when you insert the disc.
Right-click the ISO file and select “Burn disc image”
Find your ISO file in Windows Explorer. Right-click on it. In the context menu, you will see “Burn disc image” — click this option. If you do not see this option, the file extension may not be .iso, or you may need to use ImgBurn instead. The Windows Disc Image Burner window will open.
Select your DVD drive and tick Verify
In the Disc Image Burner window, confirm your DVD drive is selected in the “Disc burner” dropdown. Tick the box marked “Verify disc after burning” — this checks the disc for errors after writing and is strongly recommended. A disc that burns with errors will not boot correctly.
Click Burn and wait
Click the Burn button. The burning process takes 5–15 minutes depending on your DVD drive speed and the size of the ISO. A progress bar shows the burn status. Do not move or shake your computer while burning. When complete, the disc will eject automatically, and a success message will appear.
Your bootable DVD is ready
Label your disc and set it aside. To use it, insert it into the target computer and restart. You will need to change the boot order in BIOS to boot from DVD first — see the “How to Boot from DVD or USB” section below for complete instructions.
Method 2: How to Create Bootable USB from ISO Using Balena Etcher
Creating a bootable USB drive completely erases all data on that USB drive. Make sure the USB drive is empty or that you have backed up anything important before you begin. This process cannot be undone. Use a USB drive with at least 8 GB capacity for most operating system ISO files.
Download and install Balena Etcher
Go to balena.io/etcher and download the free version for Windows. Install it like any normal program. Etcher is clean software with no ads, no bundled extras, and no subscription. Open it after installation.
OR download this file Download
Add all files and save
Click “Flash from file” and select your ISO
In the Etcher window, you will see three steps shown visually. Click “Flash from file” on the left. Browse to the ISO file on your computer and select it. Etcher accepts .iso files directly — no extraction or preparation needed.
Insert your USB drive and click “Select target”
Plug in your USB drive (8 GB or larger). Click “Select target” in the middle of the Etcher window. Your USB drive will appear in the list. Select it carefully — make absolutely sure you select the USB drive and not your hard drive. Etcher highlights removable drives, but double-check the name and size shown.
Click “Flash!” and wait
Click the blue “Flash!” button on the right. Etcher will erase the USB drive and write the ISO image to it. This takes 5–20 minutes depending on the size of the ISO and your USB drive speed. A green progress bar fills as it writes. After writing, Etcher automatically verifies the USB to confirm it was written correctly.
Flash complete — your bootable USB is ready
When Etcher shows “Flash Complete!” with a green tick, your bootable USB is ready. Safely eject it from your computer. The USB drive may appear empty or unreadable in Windows Explorer — this is normal for bootable drives. It will only work correctly when you boot from it.
Method 3: Rufus (Best for Windows 10 and 11 ISO)
Rufus is the most widely recommended tool specifically for creating bootable Windows installation USB drives. It offers more control than Etcher and is preferred by IT professionals for Windows ISOs:
Download Rufus from rufus.ie
Go to rufus.ie and download the latest version. Rufus is a portable application — it does not need to be installed. Just download the .exe file and double-click to run it. Allow administrator access when Windows asks.
Insert the USB and select it in Rufus
Plug in your USB drive (8 GB minimum for Windows 10/11). In Rufus, your USB drive appears in the Device dropdown at the top. Confirm it is selected. If you have multiple USB drives connected, check the drive name and size carefully before proceeding.
Click SELECT and choose your ISO file
Click the SELECT button next to “Boot selection.” Browse to your ISO file and open it. Rufus will detect the type of ISO and automatically configure the best settings — for a Windows 10 or 11 ISO. It will set the GPT partition scheme and UEFI target automatically. You can leave these on default for most systems.
Click START
Click START. Rufus will warn you that all data on the USB drive will be destroyed — click OK to confirm. The writing process takes 8–20 minutes for a full Windows ISO. A green progress bar fills from left to right. When it shows “READY” in green, your bootable USB is complete.
If you are creating a Windows 11 bootable USB and the target computer does not meet the official TPM 2.0 requirement, Rufus offers an option to bypass this check during the writing process. Look for the “Extended Windows 11 Installation” option after clicking START. This lets you install Windows 11 on older hardware that Microsoft officially excludes.
How to Boot from DVD or USB
Once your bootable DVD or USB is ready, you need to tell your computer to start from it. This is done through the BIOS or Boot Menu:
Insert your bootable DVD or USB
Plug in the USB drive or insert the DVD into the computer you want to boot from. Make sure it is connected before powering on the computer.
Restart the computer and press the Boot Menu key
Restart your PC. As soon as it starts (before Windows loads) press the Boot Menu key rapidly and repeatedly. The most common Boot Menu keys are: F12 (most common), F10, F9, F8, or Esc. The exact key depends on your motherboard brand. It is usually shown briefly on screen at startup — look for “Press F12 for Boot Menu” or similar text.
Select your DVD or USB from the Boot Menu
The Boot Menu appears as a simple list of devices. Use the arrow keys to highlight your USB drive (shown as the drive name or “USB Storage Device”) or your DVD drive (“CD/DVD Drive”). Press Enter to boot from it. Your computer will start from the bootable disc or drive immediately.
If no Boot Menu appears — enter BIOS
If pressing F12 does not open a Boot Menu, enter your BIOS settings instead. Press Del, F2, or F10 during startup (varies by manufacturer). Inside BIOS, look for Boot Order or Boot Priority settings. Move the USB or DVD drive to the top of the boot order. Save changes and exit — your computer will restart and boot from the disc or USB automatically.
Dell: F12 • HP: F9 or Esc then F9 • Lenovo: F12 or Novo button • Asus: F8 or Esc • Acer: F12 or F2 • MSI: F11 • Samsung: F2 or F10 • Toshiba: F12 • Gigabyte: F12
DVD vs USB — Which Should You Use?
| Feature | Bootable DVD | Bootable USB |
|---|---|---|
| Speed | Slow — 15–40 minutes to install | Fast — 5–15 minutes to install |
| Cost | ~$0.20 per blank disc | USB drive cost (one time) |
| Reusable | No — single use | Yes — rewrite with new ISO anytime |
| Works on modern laptops | Many have no DVD drive | Yes — all computers have USB |
| Durability | Scratches easily, can fail | Very durable |
| Best tool | ImgBurn / Windows built-in | Rufus / Balena Etcher |
| Recommended in 2026 | Only if no USB option | Yes — USB is better in every way |
In 2026, USB is almost always the better choice. It is faster, reusable, works on modern machines that have no DVD drive, and is less likely to fail during installation. Use a DVD only if the target computer cannot boot from USB or if you specifically need a physical disc.
For Windows 10 and Windows 11 ISOs, use Rufus. For Linux or other operating systems, use Balena Etcher — it is the simplest and most beginner-friendly tool available. For DVD burning, use the Windows built-in burner (right-click the ISO) or ImgBurn for more control.
Download the ISO. Get a USB drive. Open Rufus. Three clicks and your bootable drive is ready in under 20 minutes.
0 Comments