To me, this sounds like an attempt for pirated software. But, if you have the CoA, you can contact Microsoft. I've had to do this twice. The first time, the Heat/Sunlight Damaged my CD. After talking on the phone and taking a few pictures, they sent me a new one. The second time, my dog got to my CD. Having to prove the same process, they actually had it for download on their website. They gave me a one-use download link.