Got your product key and just want it activated? This guide gives you the fast answer first, then walks through every method — Settings, Command Prompt, phone activation and digital license — for Windows 11 Home, Pro and Enterprise.
Press Windows + I → System → Activation → Change product key → paste your 25-character key → Next. Windows checks it with Microsoft and activates in about 30 seconds. That's it.
Press Windows + I, or click Start → Settings (gear icon).
Select System in the sidebar, then scroll to Activation.
Click "Change product key" and paste your 25-character key.
Click Next. When it finishes you'll see "Windows is activated with a digital license."
💡 Paste the key instead of typing it to avoid mistakes.
Prefer the keyboard, or activating several PCs? Command Prompt is fast and reliable. Right-click Start → Terminal (Admin) or Command Prompt (Admin), then run two commands:
1. Install your product key:
slmgr /ipk XXXXX-XXXXX-XXXXX-XXXXX-XXXXX2. Activate online:
slmgr /atoA confirmation box appears when it succeeds. To double-check, run slmgr /xpr — it will report that Windows is permanently activated.
If the PC is offline or online activation is temporarily unavailable, press Windows + R, type slui 4, pick your country and call the free automated Microsoft line to exchange your Installation ID for a Confirmation ID. It's a legitimate, no-cost Microsoft service. For the full step-by-step with every error code, see our complete Windows 11 activation guide.
Once a key activates, Windows ties a digital license to your hardware and your Microsoft account. If you reinstall on the same PC, it usually re-activates automatically. If you moved to a new computer, check whether your license can transfer in our license transfer guide.
Go to Settings → System → Activation. Under Activation state you should see "Active" and the message "Windows is activated with a digital license." The desktop watermark disappears and personalization options unlock.
Open Settings with Windows key + I, go to System → Activation → Change product key, paste your 25-character key and click Next. Windows verifies it with Microsoft in about 30 seconds.
Under Settings → System → Activation. Click the "Change product key" button next to the Upgrade or activation section, then type or paste your key.
Yes. The Settings and Command Prompt methods work identically on Windows 11 Home, Pro and Enterprise — just make sure the key matches the edition you installed.
No. Activation only validates your license. Your files, apps and settings are untouched, so you can activate an already-installed copy at any time.
Confirm the key matches your edition (a Home key won't activate Pro), retype it carefully, and check your internet connection. For specific error codes, see our full activation guide, or contact your seller for a replacement.
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