LTSC is the "leanest" official version of Windows 10 created by Microsoft. It is designed for "fixed-function" devices like ATMs, MRI machines, and industrial controllers.
It offers long-term stability with updates focused purely on security for up to 10 years (ending in 2029 for the 2019 version). 2. The "Preactivated" Hook LTSC is the "leanest" official version of Windows