I wish I could figure out how to register the node I am running on my spare Windows desktop. I have port 8333 forwarding to the Qt wallet and it shows as being reachable on Bitnodes' site.
It's certainly
not user-friendly to get your node verified. I have no idea how you would do it on Windows, but maybe you can use a linux device from the same IP?
Thanks for the link, I wish you could just register automatically from their webpage when you "Check Node".