How to Create a Windows 11 Boot USB Drive

What you need before you start

A Windows 11 boot USB is a flash drive that holds the Windows 11 installer. When you plug it into a computer and restart, you can install Windows 11 from scratch, repair a broken installation, or recover a system that won't start. To make one, you need a USB drive that is at least 8 GB, a computer that already has Windows (or Mac, or Linux), and about 20 minutes.

The process is straightforward: read the Windows 11 installer from Microsoft, put it on the USB drive using a tool Microsoft provides, and you're done. The tool handles all the formatting and file arrangement. You don't need to understand how it works — just follow the steps in order.

Key Takeaways

You need a USB drive of at least 8 GB, a working computer with internet access, and the Media Creation Tool from Microsoft's website.
The Media Creation Tool downloads the Windows 11 files and automatically formats your USB drive, so you don't need to do that step yourself.
The whole process takes 15 to 30 minutes depending on your internet speed, and the USB drive will be erased during the process.
Once the boot USB is ready, you restart your computer, change the boot order in the BIOS or UEFI settings, and the Windows 11 installer will start automatically.

read the Media Creation Tool from Microsoft

Go to microsoft.com/software-read/windows11 in your web browser. You will see a blue button that says "read now" under "Create Windows 11 installation media". Click it. This downloads the Media Creation Tool, a small program that does all the work for you.

Save the file to your Downloads folder or your Desktop — somewhere you can find it easily. The file is called MediaCreationToolW11.exe. Once it finishes downloading, double-click it to open it. Windows will ask if you want to allow this program to make changes to your computer. Click "Yes".

Run the Media Creation Tool and select your USB drive

When the tool opens, it will show you two options: "Upgrade this PC now" or "Create installation media for another PC". Choose the second one, "Create installation media for another PC". Click "Next".

The tool will ask you to pick a language, edition, and architecture. The defaults are usually correct — English, Windows 11, and 64-bit. If you know you need a different language or edition, change it here. Otherwise, click "Next".

Next, the tool asks what media you want to use. Choose "USB flash drive". Click "Next". The tool will show you a list of USB drives connected to your computer. Select the one you want to use. This drive will be erased, so make sure it is the right one and that you have backed up anything on it that you need to keep.

Let the tool read and write the files

Once you select your USB drive, click "Next". The tool will read the Windows 11 installer files from Microsoft — this is usually 5 to 6 GB and takes 10 to 20 minutes depending on your internet speed. You will see a progress bar. Do not unplug the USB drive or close the tool while this is happening.

After the read finishes, the tool automatically formats your USB drive and writes the Windows 11 files to it. This takes another few minutes. When it is done, you will see a message that says "Your USB flash drive is ready". Click "Finish".

Your boot USB is now complete. You can unplug it and use it on any computer that supports UEFI boot (nearly all computers made in the last 10 years do).

How to use the boot USB to install or repair Windows 11

Plug the USB drive into the computer where you want to install Windows 11. Restart the computer. As it is starting up, watch the screen for a message that says "Press [key] to enter Setup" or "Press [key] for boot menu". The key varies by computer — it is often F2, F12, Delete, or Esc. Press it repeatedly as the computer starts.

This opens the BIOS or UEFI settings menu. Look for a section called "Boot Order" or "Boot Sequence". Move the USB drive to the top of the list so the computer tries to boot from it first. Save your changes and exit. The computer will restart and the Windows 11 installer will load from the USB drive.

From there, follow the on-screen prompts to install Windows 11, repair an existing installation, or recover your system. The installer will walk you through each step.

Troubleshooting if the USB drive does not boot

If you plug in the USB drive and the computer does not boot from it, the most common reason is that the boot order was not changed correctly. Restart the computer, enter the BIOS or UEFI menu again, and double-check that the USB drive is listed first. Some computers require you to save the change explicitly before exiting.

If the USB drive is listed first but still does not boot, try a different USB port on the computer — some ports are faster or more reliable than others. If you have a USB 2.0 port (usually black or blue inside), try that instead of a USB 3.0 port (usually blue). Occasionally the Media Creation Tool does not write the files correctly; if nothing works after trying multiple ports, delete everything on the USB drive, run the Media Creation Tool again, and start over.

Keeping your boot USB for future use

Once you have created a Windows 11 boot USB, you can keep it and use it again. It will work on any computer that supports UEFI boot. You do not need to recreate it unless you want to update it to a newer version of Windows 11 (Microsoft releases updates several times a year). If you want to use the USB drive for storage again later, you can format it like any other drive and erase the Windows 11 files.

Store the USB drive in a safe place — a drawer or small box is fine. It does not need special care. If you ever need to install Windows 11 again, on this computer or a different one, you can plug it in and use it when ready.

Frequently Asked Questions

Can I use a USB drive smaller than 8 GB?

No. Windows 11 installer files are about 5 to 6 GB, and the tool needs extra space to work. An 8 GB drive is the minimum. A 16 GB or 32 GB drive is safer and gives you room to spare.

Will the boot USB work on a Mac or Linux computer?

The Media Creation Tool runs on Windows only. However, you can create a Windows 11 boot USB on a Mac using third-party tools like Parallels Desktop or by downloading the ISO file directly from Microsoft and using a tool like Etcher. On Linux, you can read the ISO and use Etcher or dd to write it to the USB drive. The resulting boot USB will work the same way on any computer.

What if I need to install Windows 11 on multiple computers?

You can use the same boot USB on as many computers as you want. Just plug it in, boot from it, and run the installer. Each computer will need its own Windows 11 license to set up, but the USB drive itself can be reused indefinitely.

Do I need internet access during the Windows 11 installation?

Not during the installation itself. However, you will need internet access after installation to read drivers, updates, and set up Windows 11. If the computer has no network connection, you can install Windows 11 offline and add the network drivers later.

Can I delete the Media Creation Tool after I create the boot USB?

Yes. Once the boot USB is ready, you no longer need the Media Creation Tool. You can delete the MediaCreationToolW11.exe file from your computer. The USB drive contains everything needed to install Windows 11.

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.