content: Backdoor access to your entire system no matter what OS you run, and you can't block it at the router level because it uses out-of-band packets (meaning it doesn't need an IP address), and it's hard-coded into pretty much every Intel CPU. Ostensibly meant to allow network admins to easily manage corporate systems no matter what's wrong with the OS, they have it baked into EVERYTHING, regardless of the market it's meant for. It's spyware built into the hardware itself. Disabling it involves fucking around with very obscure parts of the firmware that aren't accessible by normal user means.