Hello,
Thank you for posting in Microsoft Community forum.
Based on the description, I understand your question is related to Win 10 21H2 LTSC evaluation.
This evaluation software is designed for IT professionals interested in trying Windows 10 Enterprise on behalf of their organization. We do not recommend that you install this evaluation if you are not an IT professional or are not professionally managing corporate networks or devices.
Try get the evaluation ISO from below official website:
Windows 10 Enterprise Trial (microsoft.com)
- If you fail to activate this evaluation after installation, or if your evaluation period expires, the desktop background will turn black, you will see a persistent desktop notification indicating that the system is not genuine, and the PC will shut down every hour.
Have a nice day.
Best Regards,
Molly