Intel Security Guard isn’t something that you have to install on your system. Rather, it is a set of Intel platform-based security features that guard your system against highly advanced threats at multiple levels.

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Today, Intel systems have protective
features built into them to safeguard both hardware and software, beginning
with silicon-level security capabilities to protect systems "below the operating
system.” These measures work to prevent any malicious changes to the firmware
or boot code, securing your PC from persistent malware infections.
One element often said to contribute
to the security baseline established by Intel is Intel Software Guard
Extensions, also known as SGX, which is responsible for creating secure regions
within the CPU known as trusted execution environments, “or secure enclaves.”

Other Intel security innovations that may be connected to this “guard” concept are Intel Threat Detection Technology (TDT), which helps in identifying anomalies and malware behavior, and hardware security features such as secure boot and firmware resistance capabilities.

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In combination with all of the above
Intel features, it’s like having a security guard embedded in your computer
architecture. It makes it all the harder for cyber threats because it
safeguards from the firmware level up to the operating system level.