DrPhill
Cyber Heretic
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If you want to be paranoid then look at this article: Intel Management Engine
The Intel Management Engine always runs as long as the motherboard is receiving power, even when the computer is turned off.
The subsystem primarily consists of proprietary firmware running on a separate microprocessor that performs tasks during boot-up, while the computer is running, and while it is asleep.[7] As long as the chipset or SoC is supplied with power (via battery or power supply), it continues to run even when the system is turned off.[8] Intel claims the ME is required to provide full performance.[9] Its exact workings[10] are largely undocumented[11] and its code is obfuscated using confidential Huffman tables stored directly in hardware, so the firmware does not contain the information necessary to decode its contents.
Essentially every Intel-based computer for the last several years, including most desktops and servers, were found to be vulnerable to having their security compromised,
The ME's security architecture is designed to prevent disabling, and thus its possibility is considered by Intel to be a security vulnerability.