What is Windows 10 Enterprise LTSC 2021 ?

LTSC is short for The Long-Term Servicing Channel, Windows 10 Enterprise LTSC 2021 builds on Windows 10 Enterprise LTSC 2019, adding premium features such as advanced protection against modern security threats and comprehensive device management, app management, and control capabilities.

The Windows 10 Enterprise LTSC 2021 release includes the cumulative enhancements provided in Windows 10 versions 1903, 1909, 2004, 21H1, and 21H2. 

As Tiny10 Edition for Windows 10 is based on Windows 10 Enterprise LTSC 2021 , so the Windows 10 Enterprise LTSC 2021 Product Key can be also used to activate the Tiny10 Edition.

Windows 10 Enterprise LTSC 2021 has a 5 year lifecycle . Thus, the LTSC 2021 release is not a direct replacement for LTSC 2019, which has a 10 year lifecycle.

Features in Windows 10 Enterprise LTSC 2021 are equivalent to Windows 10, version 21H2.

The LTSC release is intended for special use devices. Support for LTSC by apps and tools that are designed for the General Availability Channel release of Windows 10 might be limited.