Buy a Windows 11 Pro key in the UK for one compatible 64-bit PC. Choose between OEM and Retail licence options for activating an existing Windows 11 Pro installation, completing a clean Windows 11 Pro installation, or upgrading a compatible Windows 11 Home PC to Pro.
Your product key, official Microsoft download guidance and step-by-step instructions are delivered by email after payment. Windows 11 Pro includes BitLocker encryption, Remote Desktop, Group Policy Editor, Hyper-V virtualisation and advanced security tools, with responsive UK-based support available if required.
Need to activate Windows 11 Pro on multiple PCs? View our Windows 11 Pro 5-user licence.
Both licences activate Windows 11 Pro on one compatible PC. The main difference is how easy it is to upgrade a PC that currently has Windows 11 Home.
Best if Windows 11 Pro is already installed or you are performing a clean Windows 11 Pro installation.
The easiest option, especially if your PC currently has Windows 11 Home.
Need Microsoft Office as well? Compare our Windows + Office bundles before purchasing Windows 11 Pro on its own and save against buying the products separately.
Yes. Choose between Windows 11 Pro OEM and Retail licence options for one compatible 64-bit PC. Both are intended for Windows 11 Professional activation, whether Windows 11 Pro is already installed, you are completing a clean installation, or you are upgrading a compatible Windows 11 Home PC.
Windows 11 Pro is the business-grade edition of Windows 11. It includes all the features of Windows 11 Home, plus BitLocker drive encryption, Remote Desktop host access, Group Policy Editor, Hyper-V virtualisation and enhanced tools for security and system management.
Valid for activation on one compatible 64-bit PC.
Choose the Windows 11 Pro licence type that best suits your installation.
Suitable for activating Windows 11 Pro already installed or completing a clean installation.
Activate Windows securely using the supplied Windows 11 Pro product key.
Official Microsoft download guidance is included with your order.
Installation and activation support is included when required.
A significant hardware change may require reactivation or further assistance. OEM licences are intended for the PC on which they are activated.
Windows 11 Pro includes Windows 11 Home features plus BitLocker, Remote Desktop host access, Group Policy Editor, Hyper-V and advanced business security tools.
| Feature | Windows 11 Home | Windows 11 Pro |
|---|---|---|
| Everyday Windows features | Yes | Yes |
| BitLocker | No | Yes |
| Remote Desktop host | No | Yes |
| Group Policy Editor | No | Yes |
| Hyper-V | No | Yes, on supported hardware |
If you do not require advanced features such as BitLocker or Remote Desktop, Windows 11 Home may be suitable for personal use.
Not sure whether you need Windows 11 Pro? Use our Windows Licence Finder to check your current Windows edition, Windows 11 compatibility and whether Home or Pro is the better match before purchasing.
Please confirm that your PC meets Microsoft’s Windows 11 system requirements before purchase. If you are unsure whether your device is compatible, contact our support team before ordering.
Your order includes your selected Windows 11 Pro product key, official Microsoft download guidance and step-by-step instructions.
If Windows 11 Pro is already installed on your compatible PC, you can use the supplied licence to activate the matching Windows 11 Pro installation.
If Windows is not installed, you can complete a clean Windows 11 Pro installation using the official Microsoft download guidance supplied with your order, then enter your product key to activate Windows.
If your PC currently has an activated version of Windows 11 Home, both licence options can be used to move to Windows 11 Pro, but the process is different.
Retail licence: This is the easiest option. Enter the Retail product key through Settings → System → Activation and Windows can upgrade directly from Home to Pro. There is no separate offline edition-change procedure.
OEM licence: The lower-cost OEM option requires an additional offline Home-to-Pro edition-change step before entering the OEM activation key. Full step-by-step instructions are supplied with your order.
If you currently have Windows 11 Home and want the simplest upgrade process, choose the Retail licence.
No. Windows 11 Professional is a one-time purchase with no recurring fees.
No. Each licence purchased on this page is for one compatible PC.
Yes. If your compatible PC already has Windows 11 Pro installed, either licence option can be used to activate the matching Windows 11 Pro installation.
Yes. Both licence options can be used with a clean Windows 11 Pro installation on a compatible PC. Official Microsoft download guidance and installation instructions are supplied with your order.
Yes. If you choose the Retail licence, enter the Retail product key through Windows Activation to upgrade directly from Windows 11 Home to Pro. If you choose the OEM licence, an additional offline Home-to-Pro edition-change step is required before entering the OEM activation key.
Both licences activate Windows 11 Pro on one compatible PC. OEM at £9.99 is the lower-cost option and is ideal if Windows 11 Pro is already installed or you are performing a clean Pro installation. Retail at £15.99 is the easiest option if your PC currently has Windows 11 Home because you can enter the Retail key and upgrade directly to Pro without the additional offline procedure required by OEM.
If Windows 11 Pro is already installed or you are completing a clean Windows 11 Pro installation, OEM is the lower-cost option. If your PC currently has Windows 11 Home and you want the simplest upgrade process, choose Retail.
Your product key, official Microsoft download guidance and installation instructions are normally delivered by email within 5–10 minutes of payment.
Responsive UK-based technical support is included with your purchase. If you experience an installation or activation problem, our support team will help identify the issue and guide you through the necessary steps.
The licence is suitable for one compatible 64-bit PC that meets Microsoft’s Windows 11 system requirements. It can be used to activate an existing Windows 11 Pro installation, with a clean Windows 11 Pro installation, or for a compatible Windows 11 Home-to-Pro upgrade using the appropriate instructions.
Report an eligible activation issue within 28 days of purchase. If the EcoKeys support team cannot resolve the problem, a replacement or refund will be provided in accordance with the Activation Guarantee.
Choose your Windows 11 Pro OEM or Retail licence using the Licence Type selector above. Your product key, official Microsoft download guidance and step-by-step instructions will be delivered by email after payment confirmation.
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Instant Digital Delivery – Download links and order information are sent by email after payment has been confirmed.
12-Month Support Warranty – Installation, activation, reinstallation and eligible reactivation support is included for 12 months from purchase.
28-Day Activation Guarantee – Activation protection for eligible issues reported within 28 days of purchase.
Clear Payment Instructions – Payment options and instructions are provided separately after checkout.
