Not really true, there was a Windows XP repo on the darkweb already
[1] https://web.archive.org/web/20100213105753/https://www.micro...
I’ve seen a ton of stuff on Empire that wouldn’t have a direct link and Empire is gone now
And afaik it was not buildable. It was a large chunk of the source code that iirc had leaked from a 3rd party who was tasked with making some component, perhaps related to the image library.