That was when Intel began installing … What did they call it…
https:// arstechnica.com/information-technology/2017/05/intel-patches-remote-code-execution-bug-that-lurked-in-cpus-for-10-years/
A remote management suite that allowed for remote access and control over the PC even after the system was powered down.
Intel, apparently, thought that was a great feature (to be fair, it is nice for remote management of a corporate network… But… Talk about handing hackers the keys to the empire).