What you need before you start

A Windows 11 boot USB is a portable drive that lets you install Windows 11 on a computer from scratch, repair a broken installation, or run Windows 11 without installing it. To make one, you need three things: a USB drive with at least 8 GB of storage (16 GB is safer), a computer that already has Windows or Mac OS, and the Windows 11 installation files from Microsoft.

The USB drive will be completely erased during this process, so move any files you want to keep to another location first. You do not need to format it yourself — the tool you'll use handles that automatically.

Key Takeaways

  • Download the Windows 11 Media Creation Tool directly from Microsoft's website, not from a third-party site.
  • Plug in your USB drive, open the Media Creation Tool, and follow the on-screen steps to write Windows 11 to the drive.
  • The process takes 10 to 30 minutes depending on your internet speed and USB drive type.
  • Once finished, you can use the USB drive to install Windows 11 on any computer by booting from it at startup.

Download the Media Creation Tool from Microsoft

Go to microsoft.com/software-download/windows11 in your web browser. This is Microsoft's official page for Windows 11 downloads. Scroll down until you see the section labeled "Create Windows 11 installation media" and look for a blue button that says "Download now" next to "Media Creation Tool".

Click that button. Your browser will download a file called MediaCreationToolW11.exe (if you're on Windows) or a similar file if you're on Mac. Save it to your Desktop or Downloads folder so you can find it easily. Do not download Windows 11 from any other website — only use the official Microsoft page.

Plug in your USB drive and run the tool

Insert your USB drive into an open USB port on your computer. Wait a few seconds for your computer to recognize it. Then find the Media Creation Tool file you just downloaded and double-click it to open it.

Windows will ask if you want to allow this program to make changes to your device. Click "Yes". The tool will take a moment to load, then a window will appear with the title "Windows 11 Setup".

Follow the on-screen steps

The first screen asks you to accept the license terms. Read them if you want, then click the "Accept" button to continue.

The next screen asks what you want to do. Select the option that says "Create installation media (USB flash drive, DVD, or ISO file) for another PC" and click "Next". This tells the tool you're making a boot drive for a different computer, not the one you're using right now.

The tool will then ask you to choose your language, edition, and architecture. The default settings (English, Windows 11, 64-bit) work for most people. If you need a different language or the 32-bit version, change it here. Click "Next" when you're done.

On the next screen, select "USB flash drive" and click "Next". The tool will show you a list of USB drives connected to your computer. Click on your USB drive to select it, then click "Next". The tool will warn you that everything on the drive will be deleted — this is normal and expected.

Wait for the process to finish

The tool will now download Windows 11 files from Microsoft and write them to your USB drive. A progress bar will show you how far along it is. This usually takes 10 to 30 minutes depending on your internet speed and how fast your USB drive is. Do not unplug the drive or close the window during this time.

When it finishes, you'll see a message saying "Your USB flash drive is ready". Click "Finish" to close the tool. Your boot USB is now complete and ready to use.

What to do with your boot USB

You can now use this USB drive to install Windows 11 on any computer. Plug it into the computer where you want to install Windows, restart that computer, and press a key during startup to boot from the USB drive. The key varies by computer — common ones are F12, F2, Esc, or Del — and your computer usually shows which one to press during the startup screen.

Once you boot from the USB, the Windows 11 installer will start and walk you through the installation process. You can also use the boot USB to repair a Windows 11 installation that won't start, or to run Windows 11 temporarily without installing it (useful for testing or troubleshooting).

Frequently Asked Questions

Can I use the same USB drive on multiple computers?

Yes. Once you create the boot USB, you can use it to install Windows 11 on as many computers as you want. The drive itself is not tied to any single machine. Just plug it in and boot from it on each computer where you want to install Windows 11.

What if the Media Creation Tool won't open?

Make sure you downloaded it from microsoft.com, not another website. If it still won't open, try right-clicking the file, selecting "Run as administrator", and clicking "Yes" when Windows asks for permission. If your antivirus software is blocking it, temporarily disable the antivirus, run the tool, then turn it back on.

Can I use a USB 2.0 drive or do I need USB 3.0?

USB 2.0 works, but it will be much slower — the process could take an hour or more. USB 3.0 or newer is faster and recommended if you have one available. Either way, the drive must have at least 8 GB of free space.

What if my computer won't boot from the USB drive?

Your computer's BIOS or UEFI settings may not be set to boot from USB. Restart your computer and look for a message during startup that says "Press [key] to enter Setup" or "Press [key] for Boot Menu". Enter that menu and change the boot order to prioritize USB drives. The exact steps vary by computer manufacturer.

Do I need a product key to create the boot USB?

No. You only need a product key when you actually install Windows 11 on a computer. Creating the boot USB requires no key. You can create the USB and use it to install Windows 11 without a key, though Windows will ask you to enter one during installation or shortly after.