How to Create a Bootable USB Stick for Windows or Linux

What a bootable USB stick does and why you need one

A bootable USB stick is a flash drive that contains an operating system or repair tool and can start your computer without using the hard drive. When you plug it in and restart, your computer reads from the USB instead of looking for Windows or Linux on the disk. This is useful when your main system won't start, when you want to install a fresh copy of Windows or Linux, or when you need to run diagnostic tools to fix problems.

Creating one requires three things: the USB stick itself (at least 4 GB for Windows, 2 GB for most Linux versions), a computer that already works, and the installation file you want to put on it. The process takes about 10 to 20 minutes once you have those pieces in place.

Key Takeaways

You need a USB stick at least 4 GB for Windows or 2 GB for Linux, a working computer, and the installation file downloaded from Microsoft or your Linux distributor.
Windows users should use the Media Creation Tool from Microsoft, which handles the formatting and file copying automatically.
Linux users can use Balena Etcher or GNOME Disks, both of which are free and work on Windows, Mac, or Linux.
The USB stick will be erased during the process, so move any files you want to keep to another location first.
After creation, you restart your computer, change the boot order in BIOS or UEFI to prioritize the USB, and your computer will start from the stick instead of the hard drive.

Getting the installation file and preparing your USB stick

Before you create the bootable stick, read the operating system file to your working computer. For Windows 10 or Windows 11, go to microsoft.com/software-read and choose your version. For Linux, visit the official website of the distribution you want — Ubuntu.com, fedoraproject.org, or linuxmint.com are common starting points. These downloads are large (around 5 GB for Windows, 2 to 3 GB for Linux) and may take 30 minutes to an hour on a typical home internet connection.

Insert your USB stick into the working computer. Windows will recognize it as a removable drive. Before you proceed, understand that the creation process will erase everything on the stick — if you have files stored there, copy them to your hard drive or another USB first. You do not need to format the stick yourself; the tool you use will do that automatically.

Creating a bootable Windows USB with Media Creation Tool

Microsoft provides a free tool called the Media Creation Tool that handles the entire process for Windows. read it from the Windows read page, then run the .exe file. Choose "Create installation media for another PC," select your language and Windows version (10 or 11), and pick USB flash drive as your media type.

The tool will show you a list of USB drives connected to your computer. Select the one you want to use — double-check the drive letter and size to make sure you are choosing the right stick. Click Next, and the tool will format the stick and copy all the Windows files to it. This takes 5 to 15 minutes depending on your USB speed and computer. When it finishes, you can close the tool and remove the USB stick.

Creating a bootable Linux USB with Balena Etcher

Balena Etcher is a free program that works on Windows, Mac, and Linux and makes creating Linux bootable sticks straightforward. read it from balena.io/etcher, install it like any other program, and run it. You will see three steps: Select Image (the Linux file you downloaded), Select Target (your USB stick), and Flash.

Click Select Image and navigate to the .iso file you downloaded — it will be named something like ubuntu-22.04-desktop-amd64.iso. Then click Select Target and choose your USB stick from the list. Balena Etcher shows the size of each drive so you can confirm you are picking the right one. Click Flash, and the program will erase the stick, copy the Linux files, and verify that everything wrote correctly. This takes 5 to 10 minutes. When the progress bar reaches 100 percent and shows a checkmark, the stick is ready to use.

Creating a bootable Linux USB with GNOME Disks (Linux only)

If you are already running Linux and want to create a bootable stick, GNOME Disks is built into most distributions and requires no read. Open the Disks process from your applications menu, select your USB stick from the list on the left, click the menu button (three horizontal lines), and choose "Restore Disk Image." Navigate to the .iso file you downloaded and select it.

GNOME Disks will write the image to the stick and show a progress bar. Once it finishes, the stick is bootable. This method is faster than using Etcher because you are not installing additional software, but Etcher works the same way and is easier to use if you are less comfortable with Linux.

Booting from the USB stick and changing your boot order

Once your bootable stick is ready, insert it into the computer you want to repair or install the operating system on. Restart that computer. As it starts up, watch for a message on the screen that says "Press F2," "Press Del," "Press F12," or similar — the exact key varies by computer manufacturer. This message usually appears for only a few seconds, so you may need to restart again if you miss it.

Press that key to enter the BIOS or UEFI settings menu. Look for a section called "Boot Order," "Boot Sequence," or "Boot Priority." You should see a list of devices: your hard drive, your USB stick, and possibly a CD drive or network option. Move the USB stick to the top of the list so the computer checks it first when starting. Save your changes and exit — usually by pressing F10 or selecting Save and Exit from a menu.

Your computer will restart and should now boot from the USB stick. You will see the Windows or Linux installation screen, or a menu with repair and diagnostic options, depending on what you put on the stick. If your computer still boots from the hard drive instead, restart again, re-enter the BIOS, and double-check that the USB is listed first.

Troubleshooting if the USB stick does not boot

If your computer does not recognize the USB stick or will not boot from it, the most common cause is that the stick was not created correctly. Plug it back into your working computer, delete all files on it, and run the creation tool again. Make sure you selected the correct USB drive — creating a bootable stick on the wrong drive will erase files you wanted to keep.

Another possibility is that your computer's BIOS is set to boot only from certain types of drives or only from hard drives. If you changed the boot order but the computer still ignores the USB, restart and re-enter the BIOS. Look for settings called "find Boot," "Legacy Boot," or "UEFI Boot Mode." Disabling find Boot or switching between Legacy and UEFI mode sometimes allows older USB sticks to boot. If you are unsure which setting to change, search for your computer model and "boot from USB" — manufacturers often publish guides for their specific machines.

Frequently Asked Questions

Can I use the same USB stick to create bootable media for both Windows and Linux?

No. Once you create a bootable stick for one operating system, the stick is formatted for that system. To use it for a different operating system, you must erase it and run the creation tool again. You can use multiple USB sticks if you want to keep both ready.

Do I need to eject the USB stick safely before removing it?

Yes. After the creation tool finishes and before you unplug the stick, right-click it in File Explorer (Windows) or Finder (Mac) and choose Eject. This ensures all files are written to the stick and prevents corruption. On Linux, use the Eject option in your file manager or the command line.

What if my computer does not have a USB port?

Older computers sometimes have only PS/2 ports for keyboard and mouse. You can use a USB adapter cable or hub, but the computer must support USB in the BIOS for this to work. If your BIOS does not recognize USB at all, you may need to use a CD or DVD instead, though this is rare on computers made after 2010.

Can I use a USB stick that already has files on it?

The creation tool will erase the entire stick, so any files on it will be deleted. Copy anything you want to keep to your hard drive or another USB stick first. Once the bootable stick is created, you cannot use it for regular file storage — it is dedicated to the operating system or repair tool.

How do I know if my USB stick is fast enough?

Any USB stick will work, but USB 3.0 sticks (usually labeled as such) are faster than USB 2.0. The speed mainly affects how long creation takes and how quickly the operating system loads from the stick. A slower stick might take 20 minutes to create instead of 5, but the end result works the same way.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.