Windows 11 Pro OEM Key – Genuine Device-Locked Licence | Cheapest Price

Buy a genuine Windows 11 Pro OEM key from LicenceHouse — the most affordable way to get the full professional edition of Windows 11 on a single PC. Instant delivery, lifetime activation, and 100% Microsoft-verified. From just €6.90.

Price: from €6.90 | Delivery: Instant by email | Licence: Lifetime, 1 PC (device-locked)

What Is a Windows 11 Pro OEM Key?

An OEM (Original Equipment Manufacturer) key is a genuine Microsoft product key that permanently activates Windows 11 Pro on one specific device. Once activated, the licence is tied to that machine's hardware — it cannot be transferred to a different PC. This is the same type of licence used by PC builders and system integrators worldwide, and it activates fully through Microsoft's official servers, giving you the exact same Windows 11 Pro experience as a Retail licence at a significantly lower price.

Full Windows 11 Pro Feature Set Included

• BitLocker Drive Encryption: Protect your entire drive with hardware-backed encryption — essential for laptops, remote workers, and any business handling sensitive data
• Remote Desktop: Access this PC remotely from any device — perfect for home offices and IT administration
• Hyper-V Virtualisation: Run virtual machines locally for development, testing, and multi-OS workflows
• Windows Sandbox: Safely run untrusted software in an isolated, disposable environment
• Azure Active Directory Join: Connect to corporate cloud identity and Microsoft 365 with Azure AD
• Group Policy & Domain Join: Enterprise-grade user and device management for business environments
• Windows Update for Business: Control update timing to avoid disruption during critical work
• Snap Layouts, DirectStorage, Windows Hello, Auto HDR — all the core Windows 11 features included

What's Included with Your Purchase

• ✅ One genuine 25-character Windows 11 Pro OEM activation key
• ✅ Lifetime activation for 1 PC — no subscriptions
• ✅ All languages supported globally
• ✅ Instant email delivery — 24/7
• ✅ Official ISO: Download Windows 11 from Microsoft
• ✅ 30-day warranty from LicenceHouse
• ✅ Full UK & EU customer support

OEM vs Retail — Which Do You Need?

• OEM (this product): Device-locked. Activates on one machine permanently. Cheaper than Retail. Best for a single, fixed installation — new builds, refurbishment, one specific work PC.
• Retail: Transferable between PCs. Best if you regularly upgrade or replace hardware. See our Windows 11 Pro Retail key.

Windows 11 Pro System Requirements

• Processor: 1 GHz+, 2+ cores, 64-bit (Intel 8th Gen+ / AMD Ryzen 2000+)
• RAM: 4 GB minimum
• Storage: 64 GB minimum
• TPM 2.0 & UEFI Secure Boot: Both required

How to Activate Your Windows 11 Pro OEM Key

1. Purchase — key delivered instantly by email
2. Download Windows 11 ISO from Microsoft (link above)
3. Go to Settings → System → Activation → Change product key
4. Enter the 25-character OEM key and click Next
5. Windows activates permanently through Microsoft's servers

Also Consider

• Want a transferable licence? See our Windows 11 Pro Retail key
• Need Home instead? See Windows 11 Home or Windows 11 Home OEM
• Prefer Windows 10? Check our Windows 10 Pro OEM key or Windows 10 Pro Retail key
• Browse all options in our Windows licence key collection

Frequently Asked Questions

Is an OEM key genuine?
Yes — OEM keys are 100% genuine Microsoft licences. They activate through Microsoft's official servers and provide the complete Windows 11 Pro experience, identical to Retail. The only difference is the licence is tied to one device permanently.

Can I use an OEM key on a fresh install?
Yes. You can use an OEM key whether you're activating for the first time during a clean install or entering it through Settings on an existing Windows installation.

What happens if my hardware changes?
OEM licences are tied to your motherboard. Minor component changes (RAM, GPU, drives) are usually fine. If you replace the motherboard, the licence cannot be transferred — in that case, a Retail key is better suited.