How to recover your Windows product key

Recently I formatted my computer and reinstalled Windows 11 Home, but now Windows isn’t activated and shows error code 0xC004F213.

Before formatting, Windows was activated.

I tried fixing the issue using Microsoft’s activation troubleshooter, but it didn’t work. I also checked the product key stored in Windows’ registry, but the system doesn’t accept it.

I contacted the store where the computer was purchased with the original Windows, and they told me to check for a sticker on the computer. I don’t have such a sticker. When I contacted them again, they referred me to you.

I’d appreciate it if you could help me restore the original activation or locate the correct product key.