The massive problems began with the release of (and its successors, like 23H2). Around September 2022 , a Windows update introduced changes that directly broke Autocom 2020.23. The software's main executable ( main.exe ) would appear briefly in the Task Manager and then close spontaneously without any error message.
If you are still having trouble, feel free to ask about: Specific error codes during activation How to find single-board VCI drivers Alternative software options for Windows 11 autocom 2020.23 windows 11