It seems you're looking for a guide or information regarding . This specific version was a major release for the 2021 product line.
For families, version 21.3.10.391 offered robust controls, including:
: The suite guards against network attacks, phishing attempts, and spam.
Kaspersky Total Security version for Windows is an all-in-one protection suite designed to provide comprehensive defense against malware, ransomware, and online privacy threats. As of 2026, while this version remains functional on many systems, Kaspersky has transitioned its core consumer offerings to a new tiered structure (Standard, Plus, and Premium) with updated interfaces. Core Security Capabilities
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