Halo 2 PC help

I brought halo 2 on PC a few months ago and it’s worked fine, recently i’ve tried palying it but it says it requires Microsoft Windows Vista or Microsoft Windows Server 2003, I have windows 7 and since it’s worked before I don’t know what to do

Add me on Skype and I can help you out man! I am always willing to help people play halo 2 again!

mohnjorrow

is my skype name

I also email, if you want my email let me know

> Add me on Skype and I can help you out man! I am always willing to help people play halo 2 again!
>
>
> mohnjorrow
>
> is my skype name
>
>
> I also email, if you want my email let me know

Ok, I don’t have a mic though so we’ll have to do it over messages