Which security feature in modern CPUs protects memory areas that contain part of the operating system from malware attacks?

Question:
Which security feature in modern CPUs protects memory areas that contain part of the operating system from malware attacks?

• encryption
• TPM
• execute disable bit
• LoJack

Explanation: The execute disable option can be turned on, if the feature is supported by the OS, to prevent malicious code from being executed inside a specific memory area that contains operating system files.

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