As I see, You've already taken some good steps by checking Windows Security and even turning off the firewall, but sometimes these Windows updates can be a bit finicky. One thing you might want to try is running the updater as an administrator if you haven't already. Sometimes, that extra bit of authority can help it get past those unwanted labels. Also, if you're looking for a reliable Windows key source, I recently came across https://digitalchillmart.com/product/windows-11-pro-32-64-bit/. They seem to offer some legit options that could come in handy for future setups.