Tips:

Get the version here (LTSC and IOT are in the one version).

Rufus here to make a bootable.

This license will activate an installed IoT-version, this means that support will end on Jan 13, 2032. 

Windows 10 Enterprise LTSC 2021 – Stability & Security for Critical Systems

Windows 10 Enterprise LTSC 2021 is a long-term support version designed for stability, security, and performance. It receives only essential security updates, avoiding disruptive feature changes.

• No feature updates – Ensures a consistent, reliable experience
• Enhanced security – Includes BitLocker, Windows Defender ATP, and enterprise-grade protections
• Optimized performance – No bloatware, minimal resource usage
• Ideal for medical, industrial, and mission-critical environments

Built for enterprises that demand reliability.