Windows 11 Pro Download: Official ISO, USB Installation and Activation Guide – United Kingdom
Quick answer: Download Windows 11 from Microsoft’s official download page. Choose the ISO for a disk image, or use the Media Creation Tool to make a bootable USB. Microsoft’s standard ISO is a multi-edition download. The edition installed depends on your device and the product key you enter during setup.
Go to Microsoft’s official Windows 11 download page
Downloading Windows does not include a Windows 11 Pro product key. If Pro was previously activated on this PC, it may reactivate automatically after a reinstall. Otherwise, enter a valid Windows 11 Pro product key to activate Pro.
Which Windows 11 Pro installation method should you use?
| Your situation | Recommended path |
|---|---|
| New PC or blank drive | Create a bootable USB and perform a clean installation. |
| Windows 10 PC you want to keep using | Check compatibility, then use Windows Update or Microsoft’s Installation Assistant. Check your current edition and activation status first. |
| PC already running Windows 11 Home | Upgrade the edition through Settings > System > Activation. A clean installation is usually unnecessary. |
| PC previously activated with Windows 11 Pro | Reinstall the same edition if needed, then check whether Windows activates automatically. |
Windows 11 Pro system requirements
Before downloading installation media, check that your PC meets Microsoft’s Windows 11 requirements. The main minimums include:
- A compatible 64-bit processor with two or more cores
- At least 4 GB of RAM and 64 GB of storage
- UEFI firmware with Secure Boot capability
- TPM 2.0
- DirectX 12-compatible graphics with a WDDM 2.0 driver
Microsoft’s PC Health Check app can help assess an existing PC. Microsoft does not recommend installing Windows 11 on a device that fails its minimum requirements.
Before you download or install Windows 11 Pro
- Back up your files. A clean installation can remove personal files, applications and settings.
- Check your current edition and activation status. Open Settings > System > Activation.
- Check your product key. Have your valid Windows 11 Pro product key available if you plan to enter one. If Pro was previously activated on the same PC, Windows may activate again without a new key.
- Prepare a blank USB drive if needed. Microsoft specifies at least 8 GB. Creating installation media deletes its contents.
- Keep the PC connected to power. Allow time for the download, installation, restarts and updates.
How to download the official Windows 11 Pro ISO from Microsoft
Microsoft provides a Windows 11 multi-edition ISO rather than a separate public download labelled only “Windows 11 Pro.” Use Microsoft’s download page to get the installation files. During setup, choose Pro if edition selection is offered and you intend to activate Pro.
- Open Microsoft’s Windows 11 download page.
- Scroll to Download Windows 11 Disk Image (ISO) for x64 devices.
- Select the available Windows 11 ISO option and follow Microsoft’s prompts.
- Choose the installation language and download the 64-bit ISO.
- After the download, use Microsoft’s Verify your download option on that page if you want to check the file’s integrity.
Using an Arm-based PC? Do not use the x64 ISO or x64 Media Creation Tool. Follow the Arm64 ISO link and instructions on Microsoft’s download page.
An ISO file can be mounted to run setup on a working PC. For a clean installation from USB, use Microsoft’s Media Creation Tool as described below.
How to create a bootable Windows 11 Pro USB
For most x64 PCs, Microsoft’s Media Creation Tool is the simplest way to prepare a USB installer.
- Connect a blank USB drive with at least 8 GB of space. Its contents will be deleted.
- On Microsoft’s Windows 11 download page, find Create Windows 11 Installation Media and select Download Now.
- Run the tool as an administrator and accept the terms shown by Microsoft.
- Select Create installation media for another PC.
- Confirm the language, Windows 11 edition and 64-bit architecture.
- Select USB flash drive, choose the correct drive and let the tool finish.
The Media Creation Tool makes installation media. It does not include a Windows 11 Pro product key or activate the PC.
How to clean install Windows 11 Pro from USB
Warning: A clean installation can erase files, apps and settings from the destination drive. Confirm your backup before selecting or deleting partitions.
- Insert the bootable USB drive into the PC.
- Restart the PC and open its boot menu. The key varies by manufacturer; common examples include F2, F12, Delete and Esc.
- Select the USB drive and follow the Windows Setup prompts for language and keyboard.
- Enter a valid Pro product key if prompted. If Setup offers I don’t have a product key and you intend to activate later, you can choose that option.
- If Setup asks you to select an edition, choose Windows 11 Pro. If Pro was previously activated on this PC, reinstall the same edition.
- Choose the clean installation option and select the intended drive or partition carefully.
- Finish Setup, connect to the internet and check Settings > System > Activation.
Microsoft’s reinstallation instructions explain the difference between running setup from within Windows and booting from USB. Running setup from within Windows may offer choices for keeping files and apps; a clean installation does not.
How to upgrade a Windows 10 PC to Windows 11
If the PC meets Windows 11 requirements, check Settings > Windows Update for the upgrade. Microsoft also provides the Windows 11 Installation Assistant on its download page for installing Windows 11 on the PC you are currently using.
- Back up important files and check hardware compatibility.
- Confirm the PC’s current Windows edition and activation status.
- Use Windows Update when the upgrade is offered, or follow Microsoft’s Installation Assistant instructions for a compatible x64 PC.
- After the upgrade, check Settings > System > Activation to confirm the installed edition and activation state.
If the PC is running Home and you want Pro, follow the Home-to-Pro edition upgrade below. Do not choose a clean install merely to change from Home to Pro.
How to upgrade Windows 11 Home to Pro without reinstalling
Microsoft recommends confirming that Windows 11 Home is activated before a manual edition upgrade. A valid Windows 11 Pro product key can then be entered in Activation settings. You can also use the Microsoft Store upgrade path if you do not already have a Pro key.
- Open Settings > System > Activation.
- Confirm the edition is Windows 11 Home and check its activation state.
- Next to Change product key, select Change.
- Enter your valid 25-character Windows 11 Pro product key and follow the prompts.
- Allow any requested restart, then return to Activation to confirm that the edition is Pro and activation succeeded.
If you do not have a Pro key, expand Upgrade your edition of Windows in Activation settings and follow the Microsoft Store option. See Microsoft’s Home-to-Pro instructions for both methods.
An edition upgrade normally keeps your files and apps, but back up important files before any major system change.
How to activate Windows 11 Pro
- Open Settings > System > Activation.
- Check that the installed edition says Windows 11 Pro.
- Check the activation state. If Pro was previously activated on this PC, Windows may activate automatically when it connects to the internet.
- If you have a valid Pro product key and Windows is not activated, select Change product key, enter the key and follow the prompts.
You may not need another product key when reinstalling Pro on a PC where Pro was previously activated. See Microsoft’s activation guide for more detail.
If you need a Windows 11 Pro product key for a compatible PC, view Brytesoft’s Windows 11 Pro product page.
Fix common Windows 11 Pro download, installation and activation problems
Windows Setup installed Home instead of Pro
On some PCs, Windows Setup detects a Windows Home product key stored in the device’s firmware and may install Home without showing an edition choice. Check the installed edition and activation status under Settings > System > Activation. If Home is activated, follow our Home-to-Pro upgrade steps using a valid Pro product key. If Home is not activated, activate it first. Microsoft also documents the optional EI.cfg configuration file for advanced installations; most users do not need it.
My Pro product key is rejected
First confirm that Windows 11 Pro, rather than Home or another edition, is installed. Recheck the key and internet connection, then run the Activation Troubleshooter from Settings > System > Activation if it is available. Follow Microsoft’s guidance for the exact error code. If a newly purchased key is invalid or blocked, contact its seller with your order details and error code.
The USB drive will not boot
Use the PC manufacturer’s boot-menu instructions and verify that you selected the USB drive. If necessary, recreate the media using Microsoft’s Media Creation Tool and a different blank USB drive. Confirm the target PC meets Windows 11 requirements.
Windows 11 says TPM 2.0 or Secure Boot is unavailable
Check the PC manufacturer’s documentation for its firmware settings and supported hardware. Do not assume a Windows 11 installation will be supported if the hardware requirements are not met.
