Activate Windows 11 step by step

If you have purchased a product key for Windows 11, the activation itself only takes a few minutes. Here is the procedure, the most common error messages, and what to do if the key does not work.

Before you start

  • Check the edition. Go to Settings > System > About and check under “Windows specifications” whether you have Home or Pro. The key must match the edition.
  • Be connected to the internet. The activation takes place against Microsoft's servers.
  • Have the key ready. It consists of 25 characters divided into five groups and is in the email you received after purchase.

How to activate Windows 11

  1. Open Settings (Windows key + I).
  2. Select System and then Activation.
  3. Click Change under “Change product key”.
  4. Enter the 25-character key and click Next.
  5. Click Activate. When it says “Active” under activation status, you are done.

Can't find the option? Press the Windows key + R, type slui 3 and press Enter. This opens the product key window directly.

Upgrade from Home to Pro

If you have Windows 11 Home and have purchased a Pro key, use the same procedure. Windows detects that the key is for Pro, upgrades the edition, and restarts the PC. Your files and programs will remain.

Common error messages

  • 0xC004F050: The key is invalid or does not match the installed edition. Check that you have typed it correctly, and that you have Home or Pro in accordance with the key.
  • 0xC004C003: The activation server has rejected the key. Contact us, and you will receive a new one.
  • 0xC004C008: The key has already been used on another PC. Contact us, and you will receive a new one.
  • 0x803F7001: Windows cannot find a valid license on the device. Re-enter the key using the procedure above.

You can also try the built-in troubleshooter: Settings > System > Activation > Troubleshoot.

Does the key not work?

All licenses from Produktlisens.no are covered by our activation guarantee. Send the order number and a screenshot of the error message to kundeservice@produktlisens.no, and you will receive a new key or your money back.

Do you need a key?