This version was the last major release before Kaspersky shifted to a "subscription-only" model in Western markets. Here is what the 21.3.10.391 build offered at its peak:
The version 21.3.10.391 was not a static release. Over time, Kaspersky released a series of important patches, denoted by letters, which added new system support, fixed bugs, and addressed security vulnerabilities. This history highlights how the software matured over its lifecycle. Kaspersky Total Security 2021 21.3.10.391 for W...
: Represents the major product generation cycle (2021 series). This version was the last major release before
While Kaspersky has since moved toward a new naming convention (Standard, Plus, and Premium), many users still prefer the classic Total Security This history highlights how the software matured over
At its foundation, the application balances cloud-driven intelligence via the with real-time heuristic file system behavioral analysis.
Here is the most likely full file name based on Kaspersky’s naming convention:
For families, version 21.3.10.391 offered robust controls, including: