i have reinstalled windows 11 on my machine but activation key doesn't work anymore

Hi Michel KORMANN

Well, normally the error code 0xC004C060 typically indicates that the product key used for activation has been reported as blocked or no longer valid. This can sometimes happen if the key was used on multiple devices or exceeded its activation limit. If your device came with a digital license for Windows 11, it should normally reactivate automatically after a reinstall—provided no major hardware changes were made.

I recommend checking your activation status under Settings > System > Activation and selecting Troubleshoot if available. If the issue persists, you may need to contact Microsoft Support to validate your license or request a replacement key if eligible.

Let me know if you need help with that process. And if this answer resolves your issue, feel free to hit “Accept answer” so others can benefit too 😊

Hi Michel KORMANN

Were you able to give the suggestion a try? Did it help resolve the issue? I truly hope it worked out, but if you're still facing a challenge, could you share what's getting in the way? I'd love to help you move forward. But if my answer resolves your issue, feel free to hit “Accept answer” so others can benefit too 😊

Harry.