Hello Disgruntled100,
You get the the error "Not Legitimate Product Key" when you try to contact support. That error is not telling you that your Product Key is Non-Genuine, I believe it means you did not enter the number in the proper format. Are you sure they asked for a Product Key or did they ask for a Product ID. They are simillare but diffrent numbers.
This forum is not the best for your Windows Media Player issue. We support Windows Genuine Advantage and Product Activation issues and as such, your issue is really outside my area of knowledge. I hate to redirect you, but I believe you would get a better answer to your issue by reposting you issue in one of the Vista NewGroups at http://go.microsoft.com/fwlink/?linkid=42486 and, of course, you can go to http://support.microsoft.com for additional support options.
On a side note: you can confirm your Vista is Genuine by going to http://microsoft.com/genuine and click the Validate Windows button.
Sorry I couldn't be more help,
Darin Smith
WGA Forum Manager