Just a tip - i use tinywall firewall to prevent windows from doing anything in the background. i used the built-in firewall as well but windows has multipel services that can act as proxy for other services to avoid blocking. tinywall is simpler. i only disable it for updates, WHEN I WANT TO UPDATE. it has been working for me flawlessly. also, install windows without internet connection.
this is the modern world of monopolies and big money. they either buy you out or crush you. this is why progress is stalled these days so much in hw and sw world. it's just not worth it and requires way too much backing to succeed and be able to compete with these monopolies.