If you have anything with Intel IME or AMD's equivalent, there's basically no way to keep your machine offline.
Discussion
lol and guess what .... intel moved their operations to haifa isreal i think ... they are stealing all of our tech and tech companies away .... thats why when i heard that silicon valley back collapse killing 500 isreali start ups i laughed ...
...But ARM is definitely safe, ARM will save us all
Oh wait https://www.arm.com/technologies/trustzone-for-cortex-a