Kaspersky Total Security — 2021 21.3.10.391 For W...
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)
KTS 2021 included a VPN module (powered by Kaspersky’s own infrastructure). However, version 21.3.10.391 only provided 200 MB to 300 MB of traffic per day for free. To lift the cap, you needed a separate subscription to Kaspersky VPN Secure Connection.
The installer offers a quick or custom install. During testing, the default installation proceeded smoothly without forced third-party toolbars. A mandatory system scan starts after installation, which can be postponed.
One caveat: The 2021 version occasionally prompts to upgrade to a newer edition, which some users may find intrusive.
Before you commit to using this legacy version in 2024/2025, know the downsides:
Build 21.3.10.391 (often denoted as patch h) was a maintenance update that focused heavily on stability and compatibility. It addressed various bugs found in earlier 2021 releases and ensured compatibility with the latest Windows 10 updates available at the time.
Conclusion Kaspersky Total Security 2021 (21.3.10.391) is widely remembered as a robust, "set it and forget it" solution. It successfully balanced heavy-duty protection with a suite of privacy and management tools that went beyond simple virus removal. While newer versions and the recent rebranding to "Kaspersky Plus" and "Premium" have superseded this build, version 21.3.10.391 remains a definitive example of comprehensive endpoint security for the Windows platform.
Kaspersky Total Security 2021 (v21.3.10.391): A Deep Dive In the ever-evolving landscape of digital security, Kaspersky Total Security 2021 (specifically version 21.3.10.391
) remains a notable milestone for Windows users. While Kaspersky has since transitioned to a new subscription model (Standard, Plus, and Premium), this 2021 release is still widely discussed by users maintaining "legacy" systems or those who prefer the classic interface. Key Features and Performance
Version 21.3.10.391 was designed to be a comprehensive "set-and-forget" security suite. Its core strengths include: Multilayered Malware Defense:
It utilizes real-time antivirus, a two-way firewall, and proactive behavior monitoring to block ransomware and fileless attacks. Privacy Tools: Features like Webcam Protection Private Browsing Safe Money
browser specifically for online banking are central to this version. Family Safety: It historically included Kaspersky Safe Kids
, offering parental controls such as adult content blockers and screen time management. Efficiency:
Despite its broad feature set, it is optimized to run with minimal impact on system resources, though some users on older hardware still report occasional slowdowns during full scans. System Requirements
To run this specific version smoothly on Windows, your PC needs to meet these baseline specs: Minimum Requirement Operating System Windows 7 SP1 up to Windows 10/11 1 GHz or faster (SSE2 support required) 1 GB (32-bit) or 2 GB (64-bit) Disk Space 1500 MB of free space The "Legacy" Status: Should You Upgrade? It is important to note that Kaspersky Total Security has officially evolved into newer tiers. Continued Support: Kaspersky Total Security 2021 21.3.10.391 for W...
If you have an active license for version 21.3.10.391, you are still protected. Kaspersky continues to provide the latest virus database updates for these legacy products. Feature Freezing: While you get virus updates, this version will not receive new feature updates Free Upgrades:
Current license holders are often eligible for a free upgrade to Kaspersky Plus
, which includes advanced features like a smart home monitor and data leak checkers. Final Verdict
Kaspersky Total Security 2021 remains a solid, reliable choice for users who want high-tier protection without necessarily moving to the newest cloud-based subscription models immediately. However, if you want the latest in identity protection and network monitoring, taking the free upgrade path to the newer "Plus" or "Premium" plans is the recommended route. Are you currently running this version on Windows 10 or 11 , and have you noticed any performance impact on your machine? New Kaspersky Total Security Software Solutions
Strengthening Your Digital Fortress: A Look at Kaspersky Total Security 2021 (v21.3.10.391)
In the ever-evolving world of cyber threats, keeping your defense system up to date is not just a suggestion—it is a necessity. Kaspersky released version 21.3.10.391
as part of its 2021 update cycle (Maintenance Release 3), introducing several quality-of-life improvements and security refinements to its top-tier suite
Whether you are looking to protect a single PC or a household of devices, this version represents a refined point in the product's lifecycle. What’s New in Version 21.3.10.391?
This specific update focuses on smoothing out the user experience and tightening web-based defenses. Enhanced Web-Antivirus
: The software now provides clearer, more descriptive notification texts when it blocks phishing or suspicious sites, helping you understand exactly why a page was flagged. Improved HTTPS Protection : If you choose to disable HTTPS traffic scanning, the Kaspersky Protection browser extension steps in to maintain safety via your browser. Official Windows 10 21H1 Support
: This version was specifically updated to ensure full compatibility with the Windows 10 21H1 release , preventing system conflicts. Streamlined Support
: A direct link to a chat with Technical Support was added to the interface (availability may vary by region). My Kaspersky Integration : Users can now access a lightweight version of the My Kaspersky portal directly from the application. Core Features You Can Depend On Kaspersky Total Security
remains one of the most comprehensive suites on the market, offering tools that go far beyond a simple virus scan: Safe Money Software Name: Kaspersky Total Security 2021 Version Build:
: Opens a protected browser for online banking and shopping to prevent data interception. Password Manager
: Securely stores and syncs your credentials across devices. Privacy Protection
: Includes webcam protection and private browsing tools to block unauthorized tracking. Parental Controls (Safe Kids)
: Advanced filters and screen-time management to keep children safe online. File Encryption & Shredder
: Protect sensitive documents in "vaults" and permanently delete files so they cannot be recovered. System Requirements for Windows
Before installing, ensure your PC meets these minimum specifications: Requirement Specification Operating System Windows 7 (SP1+), 8, 8.1, 10, or 11 1 GHz or faster (supporting SSE2 instructions) Memory (RAM) 1 GB (for 32-bit) / 2 GB (for 64-bit) Disk Space 1500 MB of free space Internet connection; .NET Framework 4 or higher Why Choose This Version?
While Kaspersky has since moved toward a new naming convention (Standard, Plus, and Premium), many users still prefer the classic Total Security
interface for its familiarity and robust feature set. Version 21.3.10.391 is a stable, "Goldilocks" version for those on older Windows hardware who need high-end protection without the overhead of the newest cloud-heavy versions.
If you are currently running an older version, you can typically update your program modules
for free to reach this build as long as your license is active. Are you ready to secure your digital life with one of the industry's most awarded security suites?
This paper provides an overview of Kaspersky Total Security 2021 (Version 21.3.10.391), focusing on its features, system requirements, and the specific improvements introduced in this release for Windows users. Overview: Kaspersky Total Security 2021 (21.3.10.391)
Kaspersky Total Security 2021 is a high-tier security suite designed to provide comprehensive protection against a wide range of digital threats. Version 21.3.10.391 (also known as MR3) is a stable release that focuses on enhancing web security, streamlining technical support, and improving the overall user interface. 1. Key Features and Capabilities
Multi-Layered Protection: Combines traditional signature-based detection with advanced behavioral heuristics to block both known malware and zero-day threats. a two-way firewall
Web-Antivirus Enhancements: In version 21.3.10.391, notification texts for phishing and potentially dangerous sites were improved. If HTTPS traffic scanning is disabled, protection is maintained via the Kaspersky Protection browser extension. Privacy & Identity Tools:
Safe Money: A hardened browser for secure online banking and shopping.
VPN Secure Connection: Encrypts data and masks IP addresses (limited daily data unless upgraded).
Password Manager: Stores and syncs credentials securely across devices.
Webcam Protection: Prevents unauthorized access to the device's camera.
Family Safety: Includes a full version of Kaspersky Safe Kids, offering parental controls such as screen time limits, social media monitoring, and GPS tracking.
Performance Optimization: Features a Gaming Mode that pauses notifications and heavy scans to ensure maximum system performance during play. 2. Technical Specifications & Requirements
Version 21.3.10.391 is optimized for performance on modern Windows environments but remains compatible with older systems. Minimum Requirement Operating System Windows 7 (SP0 or later), 8, 8.1, 10, and 11 CPU 1 GHz or higher (SSE2 instruction set support required) RAM 1 GB (for 32-bit OS) or 2 GB (for 64-bit OS) Free Disk Space 1500 MB (1.5 GB) Other
Internet connection for activation and updates; .NET Framework 4.0+ 3. Notable Improvements in Version 21.3.10.391
The MR3 (Maintenance Release 3) update brought specific functional refinements: Kaspersky Total Security 20 System Requirements
What distinguished "Total Security" from the standard "Internet Security" package was the inclusion of advanced utility features designed for comprehensive digital management:
Kaspersky has rebranded. The direct successor to "Total Security" is now Kaspersky Plus (version 21.13+). Here is the migration path: