Settings —□✕

System › Activation

Windows 11 ProEdition

Activation state Not active

Change product key Change

Windows is activated Activated online with Microsoft's servers

1Open Settings › System › Activation
2Change product key, type your key
3Click Activate
4Activated in seconds

Best Sellers, Windows

Windows 11 Pro OEM Online Key

$8.49

Microsoft Store price: ~~$199.99~~ · you save 95%

Genuine Windows 11 Pro — every Pro feature at the lowest price. Permanently tied to this machine. Activates directly on Microsoft’s servers.

Choose how you activate

Phone activation · Windows 11Cheapest. Free Confirmation ID from our Get CID page — no call. $5.99 View

Online key · Windows 11Easiest. Enter the key and it activates over the internet. $8.49 Selected

What happens after you pay

Your key appears on screen and in your email within seconds.
A step-by-step activation guide comes with your key.

Watch how activation works (15 sec)

Genuine Microsoft license Personal support chat 30 days to activate — guaranteed Secure checkout by Stripe

SKU: KL-WIN11-PRO-OEM Categories: Best Sellers, Windows Tags: OEM, Online Key, Pro, Windows 11 Brand: Microsoft

Activation Online — enter the key and it activates

License One-time purchase — permanent

Devices 1 PC

Transfer Stays with the first PC it activates on

Warranty Activate within 30 days — free replacement if it doesn't work

Delivery Instant to a few minutes, depending on demand and stock — on your order page

Best for: Users setting up a new PC who want the full Pro feature set at the lowest price and aren’t planning to switch hardware.

Why OEM and not Retail?
OEM keys are permanently tied to the first PC they activate on. Same genuine Windows 11 Pro, every Pro feature — the trade-off is no transfer rights. If you built or bought this PC and plan to keep it for a few years, OEM is the right call. Only choose Retail if you might transfer this license to a different machine in the future.

Do you actually need Pro?
Pro is worth it if you:

Travel with your laptop and want full-disk BitLocker encryption
Need Remote Desktop to access your PC from elsewhere
Work in or manage a business network
Want to run virtual machines with Hyper-V

For everyday home use — browsing, Office, gaming, streaming — Home covers everything at a lower price.

What Pro gives you:

BitLocker — encrypts your drive to protect data if your device is lost
Remote Desktop — control or share your PC remotely
Hyper-V — run virtual machines
Domain and Azure AD join
Windows Sandbox — test software without risk
Group Policy management

1x Digital license key
Download link to official installer
Step-by-step activation guide
Invoice / proof of purchase

Processor: 1 GHz or faster with 2+ cores on a compatible 64-bit processor (Intel 8th Gen+, AMD Ryzen 2000+)
RAM: 4 GB
Storage: 64 GB or larger
Graphics: DirectX 12 compatible with WDDM 2.0 driver
Display: HD (720p), greater than 9" diagonally
Firmware: UEFI, Secure Boot capable
TPM: Trusted Platform Module version 2.0
Internet: Required for updates and activation. Windows 11 Home requires internet and a Microsoft Account for initial setup.

Purchase — Complete your order securely
Receive Key — Your key appears on your order page right after payment, and we email you a link. Click “Reveal key” to see it
Activate — Enter the key during product setup or in Settings > Activation

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How this key works

Online: enter the key and Windows activates over the internet. Microsoft then remembers this PC (a digital license).

Reinstalling

Reinstall the same edition and connect to the internet — Windows reactivates by itself. If setup asks for a key, choose I don't have a product key.

New computer

No. An OEM key stays with the first PC it activates on — a new motherboard counts as a new PC. Choose a Retail key if you plan to move it.

Compare all key types — OEM, Retail, phone, Microsoft account →

Frequently Asked Questions

Yes. It's a genuine Microsoft product key that activates on Microsoft's own activation servers, covered by our 30-day activation guarantee.

Usually instantly, and at most a few minutes depending on demand and stock. Your key appears on your order page as soon as your payment is confirmed, and we email you a link to it. The key stays hidden until you click Reveal key.

No. Each product key activates one PC. OEM keys are permanently tied to one motherboard. Retail keys can be transferred — deactivate the old PC first, then activate on the new one.

OEM keys are tied to one motherboard permanently and cannot be transferred. Retail keys can be moved to a new PC by deactivating on the old one first. Retail costs more but offers hardware flexibility.

Send our support team your order number and a screenshot of the activation error. Most problems are an edition mismatch or a typo, and we'll help you fix it. If the key really is faulty, we send a free replacement within 24 hours — or a full refund if we can't replace it.

Yes. If you currently have Windows Home installed, you can enter a Pro key in Settings → System → Activation → Change product key. Windows will upgrade to Pro automatically.

Yes. Once activated, your PC receives all security updates and feature updates from Microsoft for as long as the product is supported.

If you have a Windows 10 key and your hardware meets Windows 11 requirements (including TPM 2.0), you can upgrade for free through Windows Update. Your license transfers automatically.