A Windows 11 bootable USB lets you clean-install Windows, repair a PC that will not start, or set up a new machine without an existing operating system. This guide covers the two common methods (Microsoft's Media Creation Tool and an official ISO written with Rufus), how to boot from the drive, and how your product key decides which edition you end up with.
| Method | Best for | What you need | Partition scheme |
|---|---|---|---|
| Media Creation Tool | Most home users on a working Windows PC | Windows PC, 8 GB+ USB, internet | Handled automatically |
| Official ISO + Rufus | Users who want to reuse one ISO, verify its hash, or choose settings | Official ISO, Rufus, 8 GB+ USB | You choose (GPT for UEFI PCs) |
| Official ISO mounted in Windows | In-place upgrade, not a bootable drive | Official ISO only | Not applicable |
What do you need to create a Windows 11 bootable USB?
You need a blank USB flash drive of at least 8 GB, a working Windows PC with an internet connection and administrator rights, and either the Media Creation Tool or the official Windows 11 ISO from Microsoft. Everything on the USB drive is erased, so copy off any files first.
The target PC must also have a 64-bit processor, because Windows 11 only runs on 64-bit CPUs, and it should meet the full Windows 11 requirements. If you are not sure, read our guide to Windows 11 system requirements, TPM 2.0 and Secure Boot before you start.
Advanced nuance: a licence is not needed to create the media, only to activate after installation. Microsoft's official Windows 11 download page is the only source you should use; modified "pre-activated" ISOs from other sites can carry altered or malicious files.
How do you make a Windows 11 USB with the Media Creation Tool?
Download the Media Creation Tool from Microsoft's Windows 11 download page, run it as administrator, accept the licence terms, choose "Create installation media for another PC", pick language and edition, then select "USB flash drive" and your drive. The tool downloads Windows 11 and builds the bootable drive for you.
- Insert a blank USB drive of 8 GB or more.
- Open the Windows 11 download page and select the download under "Create Windows 11 Installation Media".
- Right-click the downloaded file and run it as administrator.
- Accept the licence terms.
- On "What do you want to do?", choose Create installation media for another PC, then select Next.
- Choose the language, edition and 64-bit architecture. Pick the same language you plan to use on the target PC.
- Select USB flash drive, choose your drive from the list, and wait for the download and copy to finish.
The process time depends mostly on your internet speed. When it finishes, the drive is ready to boot on any UEFI PC.
What we commonly see: when the tool fails partway, the cause is usually a slow or unstable USB drive or a security tool locking the drive. Trying a different USB port (ideally directly on the motherboard, not a hub) or a different drive solves most cases.
How do you create a Windows 11 bootable USB with Rufus?
Download the official Windows 11 ISO from Microsoft, open Rufus, select your USB drive and the ISO, set the partition scheme to GPT with target system UEFI, then press Start. Rufus writes the ISO to the drive in a bootable format. This route suits people who want to reuse one ISO across several PCs.
- On Microsoft's download page, under "Download Windows 11 Disk Image (ISO) for x64 devices", select the edition and language and download the ISO. The download link is valid for 24 hours.
- Optional but recommended: verify the file. Open PowerShell and run
Get-FileHashfollowed by the path to the ISO, then compare the SHA256 value with the hash Microsoft lists for your language on the same page. - Download Rufus, a free open-source tool, from its official website and run it.
- Under Device, pick your USB drive. Under Boot selection, choose the ISO.
- Set Partition scheme to GPT; Rufus will then show UEFI (non CSM) as the target system.
- Press Start. If Rufus offers optional changes to the Windows installation, leave the requirement-related options unticked unless you fully understand them, then confirm that the drive will be erased.
Cause and effect: Windows 11 requires UEFI firmware with Secure Boot capability, and UEFI boots from GPT disks. If you write the drive as MBR for a legacy BIOS target, a modern PC may not see it in UEFI mode, or Windows may install in a way that does not meet the requirements.
Advanced nuance: Rufus can remove some Windows 11 hardware checks. Microsoft states that installing on a device that does not meet the minimum requirements is not recommended and that such devices are not guaranteed to receive updates, including security updates. For a business or main PC, it is safer to keep the official requirements in place.
How do you boot a PC from the Windows 11 USB?
Insert the USB drive, restart the PC and press the one-time boot menu key during start-up, then select the USB drive (often listed with "UEFI:" in front). Common keys are F12, F11, F2, Esc or Delete, but they vary by manufacturer and model, so check your PC's manual if unsure.
- Plug the USB drive into the target PC and restart it.
- Tap the boot menu key as soon as the logo appears. If you miss it, restart and try again.
- Choose the entry for your USB drive marked UEFI.
- If the drive does not appear, open UEFI firmware settings and move USB to the top of the boot order.
- On the "Install Windows" screen, choose language, time and keyboard, then select Next and Install.
Microsoft notes that some PCs may need Secure Boot temporarily disabled to boot certain media. Media made with the Media Creation Tool normally boots with Secure Boot on. If you do turn it off, turn it back on after installation, because Windows 11 relies on it as a security feature. If you changed the boot order, set it back so the PC starts from its internal drive.
For the full installation screens, disk selection and first-start setup, follow our Windows 11 Pro download, install and activation guide, which applies to Home as well. We do not repeat those steps here.
Which Windows 11 edition will the USB install?
The official Windows 11 media is multi-edition: Microsoft states it "uses your product key to unlock the correct edition". If you enter a Windows 11 Pro key during setup, Pro installs; a Home key installs Home. If you skip the key, Setup asks you to choose an edition, and that choice must match the key you activate with later.
Some PCs bought with Windows pre-installed have a key stored in the firmware. On those PCs, Setup can read the embedded key and pick that edition automatically, which is why a laptop that shipped with Home may install Home even when you intended Pro.
Advanced nuance: technicians sometimes add an EI.cfg file to the \sources folder of the USB to fix the edition and channel (Retail or OEM). Microsoft documents this file for deployment, and an answer file takes precedence over it. Most home users never need it; if Setup picked the wrong edition, the simpler fix is to reinstall and enter the correct key, or upgrade Home to Pro in place without reinstalling.
What we commonly see: the most frequent post-install support question is error 0xC004F050, which usually means the key and the installed edition do not match. Our guide to activation error 0xC004F050 explains the fix.
Should you enter the product key during setup or after?
Either works. Entering the key during setup makes Windows install the matching edition straight away. Choosing "I don't have a product key" lets you install first and activate later in Settings > System > Activation, but you must then select the edition that matches your key.
Entering the key during setup is the safer choice for most people because it removes the edition-selection step. Activation itself happens online once the PC connects to the internet, through Microsoft's activation servers.
If you reinstall Windows on the same hardware that was already activated, Windows 11 usually reactivates on its own through its digital licence, which is linked to the device's hardware ID and, if you signed in, your Microsoft account. If you moved to a new motherboard, see our guide to activation error 0x803FA067 after a hardware change.
If you still need a licence, a Windows 11 Pro retail key can be entered during or after setup and is transferable to a new PC under the retail licence terms. You can compare all editions in our Windows 11 collection.
Why is the Windows 11 USB not booting or not detected?
A USB that does not boot is usually caused by a partition scheme that does not match the firmware mode, a USB port that is not initialised at start-up, or a faulty write. Recreating the drive with GPT for UEFI, trying a rear USB port, and checking the boot order fixes most cases.
- Drive missing from the boot menu: confirm the PC is in UEFI mode, not Legacy/CSM, and rewrite the USB as GPT.
- "This PC can't run Windows 11": the hardware check failed. Check TPM 2.0 and Secure Boot in firmware settings.
- Setup cannot see the internal disk: some storage controllers need a driver from the PC manufacturer's support site, loaded with "Load driver".
- Corrupted files during copy: verify the ISO hash and rewrite the drive, or use a different USB stick.
Frequently asked questions
Can I use a 4 GB USB drive for Windows 11?
No. Microsoft asks for a blank USB flash drive with at least 8 GB of space for the Media Creation Tool, and the current Windows 11 ISO is too large for a 4 GB stick. A 16 GB or larger USB 3.0 drive gives some headroom and usually writes faster, which shortens the overall time.
Is Rufus safe to use for Windows 11?
Rufus is a widely used free and open-source tool, and it is generally considered safe when downloaded from its official website. The key safety point is the ISO: use only the official Microsoft ISO, check its SHA256 hash, and avoid "pre-activated" or modified images from third-party sites.
Does a Windows 11 USB include both Home and Pro?
Yes. The official Windows 11 media is multi-edition and includes Home and Pro, among others. The product key you enter selects the edition. If you skip the key, you choose the edition manually, and it must match the key you use later or activation will fail with an edition-mismatch error.
Do I need a product key to create the bootable USB?
No. You can download Windows 11 and create installation media without a key. A valid licence is needed to activate Windows after installation. You can enter it during setup, or later in Settings > System > Activation using "Change product key". Our activation guides cover both routes.
Can I use the same USB on several PCs?
Yes. The installation media is reusable on any compatible PC. Each PC still needs its own licence, because a retail or OEM key is meant for one device at a time. Keeping the USB is handy for future repairs or reinstallation, though it is worth recreating it occasionally so it contains a newer Windows 11 build.