The file en-us_windows_10_enterprise_ltsc_2021_x64_dvd_d289cf96.iso is the official 64-bit English (US) installer for the Windows 10 Long-Term Servicing Channel (LTSC) 2021.
: If you are looking for the evaluation version (which has different hashes), you can download it from the Microsoft Evaluation Center.
The is a specialized version of Windows 10 designed for regulated devices, such as medical equipment or factory controllers, that require a stable environment without frequent feature updates.
From 2022–2024, at least three separate warez releases claimed to be “LTSC 2021 x64” but had SHA-1: f7a4a… or b8c11… . Analysis showed: