The 21.3.10.391 version was widely deployed around March to June 2021. Operating System Support:
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: Kaspersky Total Security 2021 21.3.10.391 for W...
If you are reading this article to download actual version 21.3.10.391 for daily use in 2026, do not do so unless it is for an air-gapped computer. The 21
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The product identifier "Kaspersky Total Security 2021 21.3.10.391 for Windows" flashed on her screen as she investigated further. This specific version of Kaspersky's software had been a staple in their cybersecurity arsenal for a while, offering a comprehensive suite of tools designed to protect against various types of cyber threats. Feature Freezing: While you get virus updates, this
| Feature | 21.3.10.391 (2021) | Modern Kaspersky (2024+) | | :--- | :--- | :--- | | | Limited to 15 minutes | Unlimited via cloud backup | | VPN | 200 MB/day free | 300 MB/day free | | UI Speed | Slightly sluggish on low RAM | Optimized for SSDs | | Password Manager | Standalone app | Integrated into tray menu | | Support for Win 7 | Full support | Limited (extended support) |