anyone know wht Halo 2 PC PID key is?

[Delux]

need to get a new code from microsoft, the website asks for the PID

 

[berry120]

Product ID key. Perhaps located on the disk or box somewhere?

 

[Delux]

i keep trying to input the product key into this, but doesnt work, is there a different code?
https://support.microsoft.com/oas/default.aspx?Gprid=12429&st=1