Help with Windows Activation Issue

Hi everyone, I recently upgraded my PC, and now I’m having trouble activating Windows. After reinstalling the OS, I entered my product key, but I keep getting an error message saying that my key is invalid or can’t be used to activate this version of Windows.

Has anyone experienced this issue before? Do I need to re-purchase a license, or is there a way to reactivate using my old product key? I’ve already tried the troubleshooting tool, but no luck so far.