I would like to be more private, but my laptop does not allow other OS than windows, since it has some sort of secure boot feature. I tried to get around it and my computer was disabled and had to send it back to manufacturer to reset, Vizio laptop. What hardware should I use? You did not mention that in your privacy guide besides phones. I thought that they can surveil through the hardwares' firmwares even use speakers to turn into mics.