| Component | Performance | |-----------|-------------| | Antivirus (Signature + Heuristic) | Excellent detection rates (~99.5% in AV-Test 2021) | | Real-Time Web Filter | Blocks phishing and malicious URLs effectively | | Firewall | Stealth mode works; no leaks in tests | | Anti-Ransomware | Proactive; rolled back unauthorized encryption in tests | | System Watcher (Behavioral analysis) | Detects zero-day threats via cloud lookups |
In independent lab tests (AV-Comparatives, AV-Test) from 2021, Kaspersky consistently earned 100% protection against widespread malware and 99.8% against 0-day threats.
What distinguished "Total Security" from the standard "Internet Security" package was the inclusion of advanced utility features designed for comprehensive digital management:
In the ever-evolving landscape of cybersecurity, finding a suite that balances robust protection with system performance is a challenge. One version that struck a significant chord with users was Kaspersky Total Security 2021, version 21.3.10.391 for Windows. While newer versions have since been released, this specific build is often cited by enthusiasts as a "goldilocks" release—stable, feature-rich, and incredibly efficient. Kaspersky Total Security 2021 21.3.10.391 for W...
This article provides a comprehensive look at version 21.3.10.391, covering its installation, core features, performance metrics, and why it remains a relevant benchmark for PC security.
Kaspersky Total Security 2021 (build 21.3.10.391) is a mature, full‑featured consumer security suite that combines layered malware protection with privacy, identity, parental‑control, backup/encryption and utility features. Strengths: strong detection history, broad feature set, useful extras (VPN, password vault, parental controls). Weaknesses: potential compatibility/driver issues on some Windows builds, UI complexity for nontechnical users, larger resource footprint than lightweight alternatives. Recommendation: good for families or users who want an all‑in‑one suite; less compelling if you prefer minimal system impact or only basic antivirus.
The core engine (stored in %ProgramFiles(x86)%\Kaspersky Lab\Kaspersky Total Security 21.3) used the Kaspersky Security Network (KSN) cloud. It provided signature-less protection using behavioral detection, System Watcher, and Exploit Prevention. In 2021 tests (AV-Comparatives), this engine scored a 99.9% detection rate against zero-day malware. Cons: Kaspersky has faced allegations of Russian government
Software Name: Kaspersky Total Security 2021 Version Build: 21.3.10.391 (Internal designator: Universe 21.3) Platform: Microsoft Windows Status: Legacy / End-of-Life (EOL)
The interface in this build was a refinement of the 2020 aesthetic. It used a "metro-style" tile layout.
Pros of the UI:
Cons:
Kaspersky has faced allegations of Russian government ties, leading to a U.S. government ban in 2017 for federal agencies. The company moved core infrastructure to Switzerland (Transparency Center) and allows third-party code reviews. For most home users, the risk is negligible, but government/defense contractors should avoid Kaspersky. Telemetry can be disabled during installation.