Solution:
Autocom 2021.11 requires .NET Framework 4.7.2 or higher. While Windows 7 supports up to .NET 4.8, installing this requires you to have KB2919355 (the Platform Update for Windows 7). If your Windows 7 ISO is old (pre-SP1), the Autocom installer will fail without manual updates.
Disclaimer: This article is for educational purposes. Respect software licensing laws.
For a cracked or patched version to run on Windows 7:
While it works, running Autocom 2021.11 on Windows 7 in 2024/2025 comes with significant risks and limitations.
Solution: