A Windows 11 install USB is the tool you want when a PC is badly broken, when you're putting Windows on a new SSD, or when you just want a truly clean start. Microsoft gives you everything you need for free. But a full reinstall isn't always necessary: Windows has a built-in Reset this PC feature that fixes many of the same problems without a USB stick. This guide covers both.
Back up your files before you do anything below. If your drive is encrypted with BitLocker (common on newer laptops), make sure you can find your recovery key first, usually at account.microsoft.com under your devices.
Check the Windows 11 requirements
| Component | Minimum |
|---|---|
| Processor | 1 GHz or faster, 2+ cores, on Microsoft's compatible 64-bit CPU list |
| RAM | 4 GB |
| Storage | 64 GB or more |
| Firmware | UEFI with Secure Boot capability |
| TPM | Trusted Platform Module 2.0 |
The quickest way to check is Microsoft's free PC Health Check app, which tells you whether a Windows 10 PC can run Windows 11 and what's missing if it can't. Microsoft doesn't recommend installing Windows 11 on hardware that doesn't meet these requirements; such PCs aren't supported and may not be entitled to updates.
What you'll need
- A USB flash drive of 8 GB or more. Everything on it will be erased.
- An internet connection. The download is several gigabytes.
- A working Windows PC to create the USB on (it can be a different computer).
- A Windows license. If the PC already ran an activated copy of Windows, it normally reactivates on its own after a reinstall.
Step 1: Create the install USB
- Go to Microsoft's official download page: microsoft.com/software-download/windows11
- Under Create Windows 11 Installation Media, click Download Now to get the Media Creation Tool.
- Run the tool (you need admin rights) and click Accept on the license terms.
- Confirm the language and edition, then click Next.
- Choose USB flash drive, then pick your USB stick from the list.
- Wait. The tool downloads Windows and writes it to the drive, which can take a while depending on your connection.
Only download Windows from Microsoft. "Pre-activated" or modified ISOs from other sites are a common way to get malware.
The Media Creation Tool only makes media for regular Intel and AMD (x64) PCs. Arm-based laptops use a different process.
Step 2: Boot from the USB
- Plug the USB into the PC you want to install on.
- Shut it down completely, then power it on.
- Immediately tap the boot menu key repeatedly. Common ones are F12, F11, Esc and F8, but it varies by manufacturer. Search for your PC brand plus "boot menu key" if you're not sure.
- Pick your USB drive from the list.
If the USB doesn't show up, you may need to change the boot order in the PC's BIOS/UEFI settings. Your manufacturer's support site will have the exact steps.
Step 3: Clean install basics
- Choose your language, time format and keyboard, then click Next and Install now.
- If you're asked for a product key and this PC had activated Windows before, choose I don't have a product key. It should activate once you're online.
- Choose the Custom installation type.
- Select the drive to install on. Deleting existing partitions erases everything on them, so double-check you've picked the right disk, especially if more than one drive is connected.
- Windows copies files and restarts a few times. Then you'll go through setup. Windows 11 Home and Pro for personal use require an internet connection and a Microsoft account during setup.
- Once you reach the desktop, go to Settings > Windows Update and install everything, including optional driver updates.
Screen wording can change slightly between Windows versions. The overall flow stays the same.
Easier option: Reset this PC
If Windows still starts, try a reset before reaching for a USB. It reinstalls Windows from within Windows.
- Open Settings > System > Recovery.
- Next to Reset this PC, select Reset PC.
- Choose your options.
| Option | What happens |
|---|---|
| Keep my files | Reinstalls Windows, removes apps and settings, keeps your personal files |
| Remove everything | Removes files, apps and settings. Use this before selling or giving away a PC |
| Cloud download | Downloads a fresh copy of Windows. Good if system files are corrupted |
| Local reinstall | Uses files already on the PC. Faster on a slow connection, but may not be the latest build |
If you're giving the PC away, turn on the Clean data option under Remove everything. It takes longer but makes your deleted files much harder to recover.
During a reset the screen can stay black for a long time and the PC may restart on its own. Don't force it off, or the reset may fail.
Reset or clean install?
- Reset is the right first move for sluggishness, broken settings or a malware cleanup when Windows still boots.
- Clean install from USB is better when Windows won't start, when you're replacing the drive, or when a reset fails.
FAQ
Will reinstalling Windows remove my activation?
Usually not. Reinstalling the same edition on the same PC activates automatically once you're online, especially if your license is linked to your Microsoft account.
Do I still need a backup if I choose "Keep my files"?
Yes. It's designed to keep your files, but anything that touches the whole system can go wrong. Your installed apps will be removed either way.
Can I reuse the USB stick afterward?
Yes. Format it and use it normally, or keep it as an emergency recovery drive.
My PC doesn't meet the requirements. What now?
Check whether TPM and Secure Boot are simply turned off in the BIOS; many PCs have them but ship with them disabled. If the CPU itself isn't supported, your realistic options are to keep the current system or replace the hardware.